Take a look at what Electric Playground has to say.
A little while back >Electric Playground
>Electric Playgroundhad posted a rumour saying that DQVIII was in development for the GC. Fast foward to Spaceworld and take a look at this:
As we reported earlier this year, Enix is seriously considering making its next Dragon Warrior title for the GameCube, but Microsoft and Sony are also courting Enix very hard. Even though officials were attending SpaceWorld, they would only say that they are considering a number of offers, but they will be continuing to bring their titles to the Nintendo Game Boy Advance. Sources close to Nintendo confirmed though that a version of Dragon Warrior is in development and will be released some time in the next 24 months.