I'd actually be a great idea to have TP and the REV launch together (2-3 weeks apart), becuase honestly, I bet Nintendo has given up trying to sell GC hardware. They now they're third place (US) and there's nothing they can do about it.
I know people who would consider buying a GC just for TP,. But i'm sure there are many more who would consider buying a REV not only for TP, but Metroid, SSMB: Online and the hundreds of classic games already available (GC included).
It would demonstrate once again the power of backwards compatibility (which the xbox360 won't have), while emphasizing the fact that Nintendo makes good games.....no matter what console.....