10 MCU Characters Who Should Return In TV Show Supporting Roles

10. Harley Keener - Iron Heart

Iron Heart is set to introduce Riri Williams to the MCU, an engineering student who ends up creating her own iron suit and naming herself Ironheart with Tony Stark's blessing. How this origin will be handled in the show is still unknown, with the landscape of the universe being vastly different than that in the comics. With War Machine getting his own show in Armor Wars, it makes you wonder who else from the Iron Man mythos could appear.

Harley Keener is the young boy who assists Tony during the middle act of Iron Man 3 and then later returned for a brief cameo in Endgame, being present at Tony's funeral. Being a bit of an inventor himself and also being familiar with the Iron Man technology means that it wouldn't be an impossible task for the writers to work Harley into Riri's story.

Finding a way to incorporate Harley would give Ironheart a nice and unique connection to the Iron Man mythos while also giving Ty Simpkins another opportunity to explore the character of Harley and how he may have evolved over the past eight years.