Also, on topic - sounds pretty cool. ...even though the emphasis is on keys and I'm all about the drums, I'd probably pick them up if they made the jump.
You might be surprised on how complex some of my drum tracks can get, there are a lot of ghost notes that aren't obvious at first listen. It won't be anywhere near the crazyness of any of the Rainbowdragoneyes songs, but I think the drums would be fun to play in Rock Band.
Bottom line though, I am mostly keys heavy all keys players hopefully will have a blast!