The Avengers #86 [Regular Edition]-Fine (5.5 – 7) 2nd Team Appearance of Squadron Supreme

"Brain-Child to the Dark Tower Came" Part 2 of 2. The Avengers and Nighthawk race to Atomic City (of Earth-712) to halt the launch of Brain-Child's doomsday rocket! However three members of the Squadron Supreme are currently guarding the launch site to ensure a safe liftoff! Fortunately after Wanda stops the launch, Nighthawk is able to explain to his teammates the dire situation! And Hyperion, Doctor Spectrum, and the Whizzer agree to join the assault on Brain-Child's tower fortress! Can the eight heroes (from two different Earths) bring the child prodigy's delusional dreams to an end?
Notes: Earth's Mightiest Heroes and the Squadron Supreme meet again in Avengers 141, but as adversaries instead of allies. Len Wein contributed to the plot of this two-part story. The letters page includes a letter from comics writer Mike W. Barr)