It would kind of be amazing if Matt Rubano joined as bassist. I think he's being wasted by just touring with bands.
That would actually be pretty swank, Rubano is quite the dude on bass. Never met him but, guy has been pretty influential on me as a bassplayer. There is an undeniable feeling of something special about TBS v. 2.0, they get looked over far too much. Rubano would be great though. It's also been going around for a few months now that Dane Poppin from A Static Lullaby tried out, or is the guy. Haven't heard anything about him recently though.