couple of thoughts:
SSBM online: yes please. there's a lot of dudes on B8 who claim to be great at it, it would be good to figure out who actually is. Ulti has talked a lot of talk over the last decade. if that ever happens I will buy.
Crash Team Racing online yes please also. best racing game.
SSF2 eh. It's either the worst or second worst version of SF2. Call me when Turbo or ST has online! except they already do, and no one plays HDR in remix or classic mode anymore.