I think the problem that will this series of games will always have is that all the fans want is more characters, and so to respond to this, the developers will put emphasis on the characters and fan pleasers over the actual gameplay. Sure its cool to be all these characters, but if theyre not done well, whats the point?
Personally, I would be happy with less characters if it meant more depth in combat and gameplay. I'd rather have 5-10 characters where i truly felt like i was playing as them, instead of 30+ generic punchers and clone characters. I'm sure i'll be crucified for this comment, but as long as everyone is forums like these is shouting for characters, thats all they'll deliver... Can someone please shout "Better Gameplay!"