Did Avengers: Endgame Actually Introduce A Young Avenger To The MCU?

Though it turned out that Clint Barton's "protege" in those Avengers: Endgame trailers was actually his daughter, Lila, and not Kate Bishop, there's still room for Kate to make her debut--especially considering we're going to be getting a Hawkeye-focused Disney+ series here at some point in the future. But for all Endgame lacked in teenaged archery heroes, it did pave the way for another new hero to take the spotlight in a giant way.Yes, pun intended, because we're talking about Cassie Lang, oth