There's a slim chance that it will come out on the cube but there's still always a possibility.

I saw Pulse the other night on G4tv and they said that Midway would not be releasing its next installmant of MK on the Gamecube.

Things could change, but it sounded official.

a game like splinter cell would be a good example of wait and see as it was only announced for xbox then ported. godzilla was once only announced for gamecube then ported and so on. long-time series like castlevania and mortal kombat tend to eventually show-up on all systems. the lure of making money eventually always rears its head.