[user104658]

Originally Posted by Blurryface

Well I think they had revealed Katherine Langford had filmed scenes as Tony’s daughter (an older incarnation), that were cut last minute. Maybe they’re saving those scenes for her to play Iron Heart?

I heard they cut them because test audiences didn't like them / were confused that this new version of the daughter suddenly appeared at the end... It wa also decided that his final scene should be with Pepper for continuity (as she's been a major feature of his life throughout the MCU, whereas the daughter is brand new in Endgame).

But yeah a "young avengers" of some description does seem likely, especially with them "aging up" Scott Lang's daughter, and the focus on Hawkeye's daughter learning to use a bow.

Also because Spider-man was "snapped" for the 5 year time jump, he's still a similar age to those characters (mid/late teens) so would likely be involved.

Theyd have to do some time / alternative reality shenanigans to age up Tony's daughter, though... As she's still just a kid in the main timeline