Christopher Yost has said what season 3 of Avengers: Earth's Mightiest Heroes would've involved. Magic and mutants.
https://www.cbr.com/avengers-earths-...magic-mutants/
https://twitter.com/yost/status/1302106671171338240
The CBR article links to some concept art... but that must be fake, right? One of them shows ROM Space Knight, who Marvel doesn't own.