I was at a tournament last week and during the second battle, I encountered a rather interesting Necron force: entirely themed around the Avengers. The guy's HQ unit had them all: Iron Man (Necron Overlord), The Hulk (Destroyer Lord), Nick Fury (Cryptek), Thor, Captain America, Black Widow and Hawk Eye (Necron Lords). Sorry for the bad quality photo, but my cellphone camera sucks.

All super heroes had a unique build. It was too much to remember all, but it was a pretty though unit. Also notice the cool Avengers-logo painted on the Ghost Ark in the back. All free-hand. Nice work and very nice game!