Yes, Harmonix has said they do plan to put in a Music Creator when they feel they can pull it off properly. That doesn't mean it'll be a patch, though, and that's good for you since RB2Wii won't be patchable.
Perfect.
Yes, it's on every platform(sans PS2, which has no DLC). Also, if you care, the old DLC will be rapidly uploaded for Wii, so you'll have a lot to do. Rock Band as a platform(because that's what they designed it as, unlike Activision, who plans to have ten GH games in 2009, meaning the DLC for GHWT will be non-existent since they'll wanna push discs) will have at least 500 songs by the end of the year.
At this point, the near $200 price tag seems worthwhile. So, what you're saying is that really, All I'll need is Rock Band, Harmonix will just dump more and more songs onto it as opposed to just creating a new game. Is that it? If so, then that's great to know. And seeing as what songs are available don't necessarily matter (of course, I won't mind seeing a few recognizable names), so this'll give me lots of playtime.
Apparently, I've discovered that Rock Band 2 for Wii won't be out until December 9th... if I'm not mistaken, they did the same thing with the original Rock Band. Hmm, odd. Oh well, as long as they're making this thing for Wii, it doesn't bother me. And by the sounds of things, they've made this version much like the other ones, so it seems similarities are a common theme to them.
I'm still curious about the whole "cymbals" thing. I've noticed that only the GHWT drums have the cymbals, but the RB2 ones only have the 4 pads and the pedal.
Currently, I'm playing some Guitar Hero: On Tour, and I've apparently realized up to what point the peripheral can be tricky to use. Some of the medium songs get real tricky, but I'll manage.
~C_L~