I feel bad for Capcom when it came to UMvC as Disney was clearly the driving force of almost all its problems besides maybe the graphics...though I still think Disney is to blame as they probably wanted the cinematic look over the comic book shading style most of those models were created for.
Honestly more characters and a graphics touch up could make the game great. Hopefully they just cut out the story mode entirely so no time is spent fixing that and instead resources are used on perfecting everything around the already fantastic gameplay.
As for characters I want to see I would say a ton of returns are necessary along with some new fighters. Obviously Wolverine, Deadpool, Magneto, and Doctor Doom are absolute necessities on the returning side of Marvel as I don’t feel that the rest of the X-Men / Fantastic Four characters really have as much as a push as them. (Side note: Can Deadpool not scream all his lines this time, I hope he’s a bit more quiet and sly like he is in the movies). For Capcom, the returnees need to include Phoenix, Viewtiful Joe, and Amaterasu. These characters added so much more personality to the previous game. I feel like Jill Valentine, Akuma, or even classic Mega Man could also return.
As for new characters I believe Marvel should have brought in Star Lord in the original, but hey better late then never. Other cool Marvel newcomers could include Ant Man, maybe a new Spider (Gwen or Miles), Lock Jaw, Dare Devil, Vision, Scarlet Witch, or Loki. Capcom newcomers could maybe be M. Bison, Zack & Wiki, Leon Kennedy, Dr. Wily in his bubble ship, Protoman or Bass, or even Baby Bonnie Hood.
