X-Men/Steve Rogers: Escape From the Negative Zone

It should come as no surprise: Bad things happen to good people in the Negative Zone. When the X-Men try to build an extradimensional bridge to Limbo, an explosion sucks Cyclops, Hope, Dr. Nemesis and Namor the Sub-Mariner into the Negative Zone instead! Cast adrift in the strange dimension, the X-Men are besieged by giant monsters, insectoid soldiers, and the lord and master of the Negative Zone himself: Blastaar, the Living Bomb-Burst! Enter Steve Rogers, Super-Soldier - the original Captain America!

COLLECTING: UNCANNY X-MEN ANNUAL 3, STEVE ROGERS: SUPER-SOLDIER ANNUAL 1, NAMOR: THE FIRST MUTANT ANNUAL 1