That annual was a classic. I read it in the summer of '86. It had Freedom Force (previously the Brotherhood of Evil Mutants) defeating the combined Avengers teams and taking them to Project Pegasus, where the government's representatives (Gyrich et al) accuse the Avengers of crimes and they're imprisoned. Spider Woman (Carpenter) helps spring them. The sequel, the West Coast Avengers annual, was crap, though. It turned out Quicksilver had set up the Avengers. The East Coast annual was pencilled by Steve Ditko, doing a much better joh than he did back in the '60s.