I think we're going to have to wait a lot longer than June. KOF '02 by itself is scheduled to come out in Japan for Xbox next month. I don't see '03 for Xbox anywhere on their schedule yet. If SNK USA decided to do a '02 only release for Xbox, we might be able to see a US port by then, but I don't see them wanting to do that. In a way, it's almost like our delay in getting '02 for Xbox can be blamed on Sony.
All I can say is that if the JPN release of '02 is region-free the way Street Fighter Anniversary Collection was, I'm not waiting. I'll still pick up the US release in order to get '03 (which I can wait for more easily), but I will be playing '02 online the first day it becomes humanly availible.