I think if you take the GameCube ...
- Make it chrome in color with blue LEDs (like the Panasonic Q without the ugly stand nubs), no handle.
- Forget the "toy like buttons" for a more traditional SNES style button layout
- Allow it to play DVDs via a seperate remote (this off-loads the DVD royalties away from the console)
- Launch in late 2000 by moving Majora's Mask, Perfect Dark, Starcraft 64, Conker, and Sin & Punishment over
It could have sold a decent 40-50 million units.