Yes, balance will be an issue. In fact, I think Wolverine will have to be crippled in some way for the sake of the game
Logan CAN jump over the fireball (because he takes up less space while in the air). However, Ryu can do the same right now, just block as soon as you get in the air (then again, you probably know that already).
Wolverine is real fast, so unless he is tweaked in some way (which he will be), as soon as you get up close, Ryu will be dead.
And yes, there WILL be a new background, AND new music to go with Logan. No doubt in that. :biggrin: