AS:...But even the Tesseract, which is kind of the energy underpinning the Marvel world, had its own theme. Which remained for The Avengers. It was established in Captain America. The way the world of scoring works is, they had that theme whether they had me or not. For instance, the Captain America theme. But I think it was because of the working relationship. They very definitely wanted thematic material for The Avengers, as you might imagine. So I think all things considered, it seemed to them to possibly be a good fit...
MP: That's what fascinates me: they've tried to fit all of these people in the same world and seemingly as a way of doing that, avoided developing themes for their heroes in individual movies. Captain America stands in opposition to that plan. I can hum the Cap theme. Not so for the rest of the Avengers. Was that a plan on Marvel's part to be able to bring them together? Was there ever pushback on introducing a theme for Captain America?
AS: Well, we had talked about the whole range. I think, just in theory, everyone agreed early on that the idea of everyone having their clearly definable theme would probably be more distracting than helpful. What we discovered in Captain America is that there is a blessing and a curse to a clearly definable theme. The blessing is, it's clearly definable. The curse is, it's clearly definable! And so, a little of it goes a long, long way.
You can grow tired very quickly of, every time you see someone, hearing, 'Ba ba-ba ba bum!' [Laughs] No. It's like, 'Oh my God I'll kill myself if I hear that again.' So, we kind of went through the experiment on Captain America. And we discovered that a little goes a long way. And you can reference the theme, you can be a little more abstract with it, and still retain a kind of presence with it. For instance, in The Avengers, the Captain America full-on theme really doesn't appear....
Read the full interview:
http://whtc.com/news/articles/2012/may/11/avengers-composer-alan-silvestri-bringing-heroes-t/