Actually there have been two other CDs related to this movie....the Soundtrack which was simply music that was actually used in the movie. There was then another CD of music "inspired by", but it included alot of country artists...I think even Bob Dylan had something on that one...most of it wasn't original material either, I believe.
Sorry, but I don't have any info. on who else might be on there....I kind of get the feeling though that it will be more contemporary people....maybe some of the ones mentioned for the first one, who didn't get included?
I guess we will find out on August 31st.
As far as information about Stapp....what I know is that he is currently recording in Miami. Most all the stories about the breakup have also mentioned that he is working with a Canadian band....Tea Party....about which I've heard lots of good things.