I didn't try it myself, but I heard that custom soundtracks are supported. Transformers 80s animated movie soundtrack, here I come!
I only smacked around the inactive second player, but it looks like everything's as it should be. I tried 16:9 mode, and it's a true widescreen mode. When playing on a 4:3 TV, fullscreen mode is true fullscreen, too. None of that Rez HD "original game mode" bullshit where the game plays pillarboxed in a letterbox when played on a 4:3 TV.
This game is going to be a definite buy. Damn, all these good fighting games coming out this year. KOF98UM, SF4, UFC, BB, KOFXII, and this. It's like 2000 all over again.