There are only two songs on the confirmed list for RB3 that I know and love already. This is looking more and more like a rental for me instead of an automatic buy.
speak for yourself. "Power of Love", "Bohemian Rhapsody" and "Here I Go Again" alone are so full of awesome that they justify the purchase for me.
I hope and pray they allow for track importing in the Wii version. I know since there's no HDD you can't do it the same way as the PS3/360 versions... but maybe there can be some way to register your copy of RB2 with Harmonix, then the RB2 songs appear for you to DL in the store?
I know, I know: wishful thinking....