I think it would be cool if one of the Super Mods added 32 Level Leaderboards for each track in the game. This isn't something that HAS to happen, but it's just something that would make MKWII more fun to speedrun.

There's already a site that's been used for years for submitting Time Trial PBs and mkwrs archives every WR.

or http://www.mariokart64.com/mkw/