According to gamefront.de, a german site, Square is set to develop for the Nintendo Gamecube.
Supposedly, Square is going to hold a press conference soon detailing their plans on the Nintendo Gamecube. They are going to be releasing a port of FFXI in addition to a new game, that might be exclusive. Reportedly, Nintendo paid several billion yen to Square to develop on the Gamecube.
This is all completely unconfirmed, and was reported by www.gamefront.de