Avengers #672 (Kirby Heck '1965 T-Shirt Cover)
WORLDS COLLIDE Part 1
Following the events of GENERATIONS comes the long-promised clash between the Avengers and the Champions! The countdown has started as the High Evolutionary, a twisted scientist determined to create a better world at all costs, sets the Earth on a collision course with destruction! The Avengers and the Champions are ready to meet this threat - but will their first cataclysmic clash deter them from Changing the World?