I hope the AI gets different difficulty settings, default being the arcade one or something like that.
I'm OK with the arcade AI being there, but it's not much fun nowadays. What I personally mean is, it's no longer fun to "exploit" the AI to win... you want a more realistic, human-like AI to play against. Besides, the AI cheats like hell: grabs you mid-uppercut, "predicts" your moves (since it can read your button inputs) ... and can even grab you from Johnny Cage's shadow kick! That's not fun, it's unfair, and only makes you resort to crap tactics like jump kicking back and forward.