Avengers: Earth’s Mightiest Heroes is probably my favorite Marvel cartoon series since the original (non-Bakshi) Spider-Man show of the ’60s. Still not up to the Timm / Dini DC shows, which is saying something because I don’t love DC like I do Marvel. Still, those connected animated series are easily my favorite discrete version of the DC universe.
Anyway, they had several heroic guest stars in the first season of the Avengers show, and a metric ton of villains. My main question was, as Marvel has under previous regimes sold off various character rights to other studios (not likely to happen again now that Disney owns the company), which characters would be flat out excluded from appearing on the show.
This still largely answers the question. If the FF, Spidey and Wolverine are kosher, then it’s possible that there are no character restrictions at all.
Probably won’t see the show until the season hits DVD, but damn, that’s sweet right there.