Cause while fans love the idea of a new iteration, they just really want the old movesets they are used to. Its a shame really, cause one of the most exciting things about Marvel 4, to me, is that we might get a huge injection of new cast members & moves on the Marvel side.
This is going to force the dev team to really flesh out the Marvel side of the roster, which is something that did happen to a certian extent, but not nearly as much as it did on the Capcom side of things last go around. I'm super excited to see some Inhumans, some newer Marvel characters, and some not so often seen Avengers & all of their respective villains in action. There is so much gameplay potential in some of the potential new cast members. Black Bolt alone gets me excited.