PETER PARKER arrived an hour later at the Avengers Base. During the final battle against Thanos, it was destroyed, but thanks to Pepper it was rebuilt in just two weeks.

Ned looked around with big, big eyes and shouted "awesome!", and "great, unbelievable, dude!" every second second. 

"yeah, nice", MJ said while Harley picked some cookies. He and Peter hid them since Pepper said, only one per day. 

"looks like our elementary schools", Shuri said. 

"kiddos, come here", an adult voice suddenly said behind them. Ned jumped and shrieked like a pig. Peter had to laugh. 

"Hey, Doctor Strange, how's it goin'?"

"well, come here." He made the portal bigger and the six teenagers walked trough it. 

they landed in the main-room. bursting into Bruce arguing with Scott, a blonde girl in a black suit attacking hawkeye aka clint barton, bucky barnes and sam wilson throwing bread at each other, carol danvers trying to flirt with valkyrie and hope van dyne sitting there and awkwardly talking with Wanda - who had a awesome strange costume. 

within a second, everyone was silent. 

"teenagers?", asked hope, upset. 

"it was his idea." bruce pointed at Peter. "okay, uhm. the plan is: bringing back natasha romanoff and tony stark."

"and pietro maximoff, and vision."

"positive. we try." bruce nodded. "sooo, anyone knows something how we could do this?"

wanda raised her hand. "uhm, i, made this with vision --"

"stop right there", strange interrupted. "no. we're not doing what you've done with vision."

"fine." wanda looked a little bit angry. 

"okay, let's start with natasha: first of all, we can't snap her to life. because of her sacrifice. But maybe, if we get the soul stone back to vormir, with 'a soul for a soul' we should get her back. if we come in the right time!"

"not again the infinity stones." Peter sighed. "i'm not touching any of them."

"you don't have to", hope said. "we're adults. we'll handle it, little boy."

"i'm not --, we're not, -- what the actual fuck!" 

"language!", someone said. not sure, who. 

"natasha must be first, she knows something about tony stark", the blonde girl in the black widow suit said, she had a remarkable strong russian accent. 

"i'm sorry, who are you?", scott lang. 

"yelena belova", the girl said, "natasha was my sister."

"why do you have different surnames then?", asked scott. "you --"

"oh my god, scott", hope said, "you can't just ask people why they have different surnames." 

"oh, he can", yelena answered the question below. "natasha and i, we're not related."

"you sound like wanda, or, like she did, where's your accent, wanda?" clint looked confused as if he didn't notice until now. 

"enough", wanda said instead of answering clints question. "just go back to natasha."

"right", yelena approved. "the scottish language should fuck off."

nobody had courage enough to say "language". instead, sam and bucky looked at each other, then at scott and bursted into laughter. 

"this will never get old, scottish language, you'll never ever get away from this", sam said, almost crying. 

"funny, guys, really funny, i'm dying." scott rolled his eyes, but even hope smirked at him. 

"we'll get natasha back, we have to travel to a time point, where we can steal the stone: get it back and say 'a soul for a soul'".

"hey, you looking for this?!"

they turned around and rhodey came trough the door, followed by nebula. he threw a pancake at sam. 

"why a pancake, dude?" "gross", bucky said. 

"he talks." scott said and walked away, just in case bucky would get angry. 

"sit down", dr Strange said. "i'm telling the plan:

first of all: we have to get two infinity-stones, the soul stone and the time stone,

second: first, we go to vormir and in exchange for an soul we get an soul, but it has to be after nat's sacrifice, so after 2014.
third, with the time stone, we reverse time and get pietro, tony and vision back. 
that's it."

"well", peter said. "good. what's the plan?"

"i literally just told you the plan!" dr strange seemed close to freak out. 

"nono, yeah." peter nodded instantly. "but what's the plan?!"

"THAT's THE PLAN!"

"no, how are wo gonna do it?!"

"ah, you could've mentoined that earlier. so, we have to get in the right time..."