[quote=@Natty]
I'd argue that the main avengers theme is very memorable now, although that's the only one 
[/quote]
Well there's also the title crawl... that one I could hum if someone asked randomly. Can't say that for the Avengers theme but that's just me.

[youtube]https://www.youtube.com/watch?v=UhVjp48U2Oc[/youtube]