I don't see why we'd need it, to be honest. The only thing missing nowadays is the lack of Rental Pokemon. The minigames went to Pokemon Channel, the storage ability went to Pokemon Box, and most of the rest went to Colosseum itself.
Yeah, I hate the fact that they are spread across 3 games, and as such I'd have rather had them all on the one game. It would save us all a lot of money, that's for sure. This is what I hate about Pokemon Company, is the whole franchising side of things.
Perhaps, I'd like to see Colosseum 2 having all those features, on the one game. The inclusion of rental Pokemon was the only thing missing that made the game [Colosseum] complete. That, and the lack of wild Pokemon. That is what they should really do, have a full 3D game with wild Pokemon, gym leaders to battle, a story to tell, keep it much like the Game Boy games, but in full glorious GameCube speed and graphical power. That would be what I'd really like to see.
Pokemon Company, GameFreak, whoever reads this, do it for the fans, not for the money. Thank you.
- Toothache, dentist of good points, and not just my teeth ;-)