This is after Winter Soldier, so Sam will be in it (as an Avenger), but SHEILD didn't fall and Furry is still the leader.
"It's Tony," Bruce repeated in a hushed tone, "Somehow Tony was magically de-aged... Well, it does look like him, but how did you know for certain?"
"My newest weapon upgrade was fingerprint scanners on all of my guns. Only members of the team can take them out of their holsters and in turn, use them to shoot targets." Natasha explained.
"I know. I'm his lab partner; he tested the technology on Sam, Rhodey, and I before giving them to you. The question is, what do we do about this? And more importantly... why was he so afraid of Steve? And how did you know that speaking in Italian would help?" Bruce asked.
"Adult Tony can be soothed with Italian, it made sense."
"Right." Bruce looked over at the child, who was currently staring across the quinjet, directly at them.
"Alright, ETA 5 minutes," Clint announced. When they arrived at the Helicarier and got off, Fury and Agent Hill met them at the entrance. Fury looked at them expectantly, then before anyone could say anything, his eyes fell on the child and he frowned,
"Debrief room. Now," when they got to the debriefing room, Fury had Agent Hill take the child into the next room. "Does anyone want to tell me how and why you've brought back a child? And how he looks so much like Stark?"
"Well that's it Director, Bruce and I believe that he may be a de-aged version of Star," Natasha told him.
"How?" Fury demanded.
"I did sense a strong presence of magic when we found him. It is possible that a curse could have been placed on friend Stark." Thor agreed.
"Wait, but what about the arc reactor? Wouldn't he still need it?" Steve asked, more to Bruce than anyone else.
"Well, theoretically if he were reverted back to what his body was like at that age, and not simply de-aged, no, he wouldn't." Bruce explained, before inquiring, "Is that possible Thor?"
"Sorcery is not an area I know much of, but it sounds like a spell that could have been cast," Thor furrowed his brow in deep thought.
"Could it have been Loki?" Steve wondered.
"Nay! My brother is securely confined in his holding cell on Asgard."
"Well go to Asgard and make sure he still is. The rest of you, go to the tower and don't let a single person see him in this condition." Furry ordered,"You are dismissed."
The Avengers, save Thor, arrived at the tower to find Sam and Rhodey, who had both been on a month long mission of their own, lounging on the couch. Though they were both Avengers, they were both still in the military and went on missions when needed.
"Where's T-" Rhodey started, but cut himself off when he saw him and sighed, "How?"
"How what? Who's the kid?" Sam questioned sitting up straight.
"Well, it's either somehow Tony himself, or a clone... Which is it?"
"He was de-aged," Bruce explained.
"How'd you-" Steve started.
"I've seen pictures of him when he was this age. There is no way that you found and brought back a kid who just so happened to look exactly like him." Rhodey told him.
"What's going on?" Sam asked, him and Rhodey were both standing now.
Sorry, this took so long. I know it's short and barely anything, but I'll try to do better.