My opinion~~
KOF2000 might appear on following consoles:
DC: Sales in Japan is really bad, not as good as US market therefore I have my doubt that SNK will release on it after Last Blade.
PS2: Most likely. Look at every KOF series and other titles release on PS therefore it has a great chance to show on PS2 Platform
XBox: unknown.....since Konami and some big companies show interest in Microsoft's mighty machine, maybe.