Guitar Hero 4, What gives on the setlist?

I've played both Rock Band 2 and Guitar Hero 4 on all the instruments. Overall I'd say Rock Band is way better. Has a better appearance, gameplay, and songs. Guitar Hero 4 has that sweet GHtunes thing, Hendrix, loads of guest appearances, and some decent customizing options. But what bugs me the most about GH4 is the songs. It seems like they got a few headliners (both Hendrix songs, both Ozzy songs, La Bamba, Sweet Home Alabama, and Santeria) everything else just seems like I'm forced to play them. Dammit is a good song thats fun same as in by Muse. Most of the songs were on Rock Band so I choose not to play them on it cause the setup seems to give me a headache playing. So my question is.... Is it possible that Rock Band will get DLC for the good songs from GH4 like the ones listed or other fun ones. "Are you Gonna Go my Way" already made the fun transition. Besides theres only so many times I can take listening to "No Sleep Till Brooklyn" (good song but on GH it's played sooooooo much)