To me, it's obvious that there's a big gap and a bigger demand for villains (playable and otherwise). As far as heroes go, there seems to be a lot more fertile ground to add characters to the game from the X-Men side of the marvel universe. Magik being added is very exciting and I would hope that we might see more New Mutants or X-Force related characters....
X-men Heroes:
Sunspot
Cannonball
Dani Moonstar
Wolfsbane
Warlock (w/ Cypher as support)
Havok
Forge
Polaris
Multiple Man
Warpath
Banshee
Blink
Pixie
Non X-men Heroes (a lot harder to come up with good ones that we don't already have):
Moon Girl
Hercules
Shang-Chi
Misty Knight
Adam Warlock
Viv Vision
Villains:
Sabretooth
Lady Deathstrike
Enchantress
Lizard
Mysterio
Shocker
Scorpion
Rhino
Electro
Black Cat
Geogeo999 said: Honey Badger!!!![snip]
Ed_Dragonrider said: Hela[snip]
Kingart813 said: 6. Sabretooth