Young Avengers
Kevin Feige has previously hinted that Endgame would sow the seeds for the Young Avengers in the MCU – and he wasn’t kidding as at least two, possibly three or four, future heroes are present in the movie.
The film opens with a flashback to when Clint Barton lost his family to the Decimation. Before they turn to dust, though, his daughter Lyla impresses him with her archery skills. He congratulates her and calls her “Hawkeye.” This feels like a big clue that Lyla could become the MCU stand-in for Kate Bishop, the teen who takes over from Barton as the next Hawkeye in the comics.
Elsewhere, once Ant-Man emerges from the Quantum Realm to find he’s missed five years, he discovers that his daughter Cassie is now a teenager. As he hugs her, he says: “you’ve gotten so big.” This has to be a nod to her superhero identity as Stature in the comics.
Also, the introduction of Tony and Pepper’s daughter Morgan Stark leaves the door open for her to take on her father’s mantle in time. Perhaps as a version of Ironheart – Tony’s teen protege – on the page.
Lastly, Harley makes a silent cameo at Tony’s funeral, his first role in the MCU since Iron Man 3. Now that he’s much older, it’s not out of the question that he could likewise follow in Stark’s footsteps and maybe become Iron Lad in the Young Avengers.