alliance in order to combat a threat of this magnitude. galvatron and the decepticons then step into the base followed by F.I.E.L.D. personnel aiming their weapons at them. optimus tells them to hold their fire as they and the decepticons have put aside their differences to face a common threat because it's what starscream would've wanted. optimus then tells jazz and cliffjumper to take the omega to cybertron and help out his fellow wreckers while he and the others will take the nemesis to go after unicron. we then cut back to cybertron where the zombiecons finally reach the core while ultra magnus and the wreckers are pinned down. however before they can poison the core jazz shows up to and smashes the zombiecons with his cyber-nunchucks. after the other wreckers are freed ultra magnus welcomes jazz back to the team followed by cliffjumper showing up to blast through the remaining zombies followed by ultra magnus making cliffjumper an honorary wrecker which excites cliff followed by he and jazz high-fiving. however they are surrounded by even MORE zombiecons which greatly outnumber them pinning down the wreckers before the zombiecon touches the core and infects it causing the entire planet of cybertron to be infected by unicron's blood causing the surface of the planet to slowly crack apart and dark energon crystals to grow out of the cracks and the cybertronian population start turning into dark energon zombies spelling doom for cybertron as they know it. jazz then contacts omega and tells him to help prime and the others while they deal with the situation here. we then cut to the nemesis landing on the surface of unicron's planet mode and both factions step out to proclaim to unicron that the war is over and that from now on they are united to destroy him once and for all and that from this day forward they are no longer autobots nor decepticons: they are cybertronians. unicron tells them empty words before sinking his pincer deeper into the earth. the transformers are then surrounded by more of unicron's undead soldiers before galvatron blasts a hole in unicron's surface allowing optimus and galvatron to enter the belly of the beast while the others fight off unicron's forces from the outside. we then cut to optimus and galvatron travelling through a tunnel that appears to be unicron's dark energon bloodstream while trying to resist the sustance's evil influence. the two then hear unicron's voice telling them that they're too late and that his army of the undead has already infected cybertron and that it will only be a matter of time before the planet deteriorates and is reduced to space dust meaning that both worlds they hold dear are doomed. optimus and galvatron however don't listen and keep on moving before we cut back to the surface where we see the other transformers being overpowered until the stunticons and combaticons combine and form menasor and bruticus. the two then smash the puny zombiecons until giant zombiecons rise out of unicron's surface along with several more normal-sized ones. luckilly help is on the way when omega supreme arrives on the scene along with trypticon who both proceed to destroy the remaining giant zombiecons. we then cut to optimus and galvatron inside unicron before they suddenly feel a tremor beneath their feet. the two then realize what's going on: unicron is transforming. the then cut back to the surface where we see pieces of unicron's surface shifting around causing our heroes to slip and fall before the chaos bringer is fully transformed into his robot mode. unicron then tells them that resistence is futile as he is unicron the destroyer and he is eternal. unicron's chest panels then open up revealing the planet-eater mouth inside his chest and proceeds to continue munching on the earth before we cut back to optimus and galvatron finally reaching his heart only to be surrounded by unicron's antibodies. the two then double-team and slash their way through unicron's antibodies until more keep popping up followed by galvatron telling optimus that he'll keep them busy while optimus goes for the heart. optimus understands and heads towards unicron's spark while galvatron sacrifices himself by letting himself get eaten alive by the antibodies. optimus then promises galvatron that his death will not be in vain before opening the matrix of leadership. optimus then opens up the matrix causing the light of primus's spark to snuff out unicron's spark like he did with sideways causing unicron's body to crumble and all the zombiecons to crumble aswell freeing the wreckers. optimus then activates his jetpack and flies the heck outta there and our heroes board the omega and the nemesis respectively while unicron gives an ominous warning that as long as hatred exists in the universe he will always be back before blowing to bits thus saving the earth. our heroes then return to earth to be re-united with seth, lieutenant, fox, trevor, and the kids. optimus tells their human friends that while they have shared many great times on earth now they must say goodbye as their home planet is dying and that they must leave earth behind in order to repair cybertron from the damage caused by unicron. the kids then begin tearing up and say their goodbyes to their autobot friends: kevin says goodbye to bumblebee, james says goodbye to wheeljack, brittany says goodby to arcee, and alexis says goodbye to the twins. after that, optimus picks up the omega lock and carries it with him to the ship while the other cybertronians board the omega and the nemesis and blast off towards cybertron while the kids wave goodbye. after that, we cut to the two ships arriving on the tainted cybertron and our heroes are re-united with jazz, cliffjumper, and the wreckers to inform them that the war is over and unicron is finally gone. ultra magnus is shocked to see autobots and decepticons together followed by optimus falling down and hotshot asks if he's okay. optimus then tells hotshot that using the matrix at its full power to destroy unicron drained alot of energy from him and tells hotshot that he plans on using the last bit of energy he has left in order to open the omega lock and heal their homeworld. red alert then warns optimus that doing such a thing is dangerous and can kill him, however optimus assured red alert that sentinel told him of the risks and that he's done all he can to protect this world and that even though this may be his final moment in this world where his story ends a new story begins (of course referring to hotshot). elita and optimus then hold hands and share one final kiss before optimus picks up the omega lock and activates his jetpack and flies down to the core of cybertron where he uses up his last reserves of energon to open the omega lock healing the core of cybertron causing the dark energon crystals to disappear and the cracks to close up and the zombified citizens of cybertron to turn back to normal. optimus then lays down right next to the core and closes his eyes with a smile reflecting on his life and all the adventures he had before peacefully passing away causing his chest to open and the matrix to be ejected from his now-sparkless shell. we then cut back to all the cybertronians from the series autobot and decepticon alike to celebrate the restoration of cybertron and a new golden age of everlasting peace on their homeworld, all the while hotshot and arcee try to comfort a crying elita-1 who is sad about losing her optimus. we then see the matrix of leadership levitate out of the well of all sparks and land in hotshot's arms. hotshot then places the matrix inside his chest and becomes rodimus prime. rodimus then turns his head and smiles to see that he is being watched over by the ghosts of optimus prime, sentinel prime, and alpha trion who all smile back at him before arcee walks up to rodimus and tells him that she's proud of him before the two share a kiss. after that, we cut back to earth where we see kevin's mom and dad wave goodbye to their son as he walks off for his second day of school. once kevin arrives at school and meets up with james, brittany, and alexis kevin then notices a car parked in the driveway that looks just like bumblebee's season 1 and 2 alt mode before the four go inside the building and our movie ends with the school doors closing.