The MCU has never shied away from using legacy characters. Scott Lang in the Ant-Man might be the most prominent we have so far and pretty soon, Captain Marvel will follow suit. In the coming years after Avengers 4 however, we may be getting an entire team made up of them. According to We Got This Covered, Marvel Studios is eyeing to do a Young Avengers film comprised of legacy characters avid comic fans will recognize as the standard Young Avengers line-up: Patriot, Iron Lad, Wiccan, Stature, Hulking, and Hawkeye.
A film like this possibly in development is not a surprise at all considering the seeds they’ve planted in previous films and the studios’ plans in branching out beyond the existing marquee characters. We even have one of the team members already with Cassie Lang, who has been rumored to make an appearance as a teenager in Avengers: Endgame. With the introduction of Skrulls in Captain Marvel, a Hulkling appearance down the line is more likely. Heck, it’ll only be a matter of time until they introduce Kate Bishop in the films.
Source: We Got This Covered