Personally I plan on getting Wrestlmania XIX, P.N.03, and I already have F-Zero GX and Madden/NCAA Football 2004, so there's other games out there to buy for the GCN, Game. But then again, I bought SCII four months ago, so eh...
The Link over Sony/Xbox sales don't surprise me, and the GCN version is pretty close to the PS2 version in Japan, so I hear.
All three versions are sure to be system sellers globally, though I'm not too sure about the PS2 version in the US (too much competition, and pretty much the worst version of the game).
-Official Ninja of [coming soon]...