From what I remember, Tim never officially joined the team and from the last time I talked to him I believe he told me he was getting into professionally making music. He's a good person and really talented, I'm glad that he got to become pretty successful at what he does and enjoys doing. I doubt he would have time to do it, but it'd be pretty awesome if he got to create a tune for the main menu, or even just for the game in general.
Also I believe someone who worked for Bruce offered to help out with making music for ESF, but I'm not sure what happened with that, or if I'm even remembering it correctly.