Fight against a guy via internet? Hope these koreans will not destory these series. If there is no lag and no cheater, i would have a try.
Welcome to 2001 man, a KOF MMO has been in the works for years - Character Models are still floating around I think.
Just google up “King of Fighters Online”
LATER EDIT: Here, have some screenshots from 2002.
Saotome Kaneda I choose you!
kof and samurai shodown are already online…