Sounds like we could come up with a pretty cool melting pot of ideas. It doesnt matter too much if the style are different on the lead playing once the backing tracks work.

1 solo each sounds the way to do it.

How about we come up with a few backing tracks between us and take a vote on what to solo over? That way everyone gets input from start to finish and doesnt have to solo over something they see as unworkable.

Timing and number of bars etc all comes down to the backing tracks, so why not post up a few ideas in the Listening Forum?
Subject line: Metal Jam Backing - Superhuman (or what ever your handle is)

Post any ideas either so we can get the show on the road. I'll get something together in the next 24 hrs myself.