In the life of every hero, there are crucial choices made and victories narrowly achieved. But what if things happened another way? What if Uncle Ben survived, and Aunt May died? What if the Invisible Girl died in child birth? What if Loki found the hammer of Thor? See your favorite heroes in worlds that never were! Featuring the Sub-Mariner, the Hulk, Dr. Strange, Captain America, Phoenix and more! Collecting WHAT IF? #40-42, #44-47 and material from WHAT IF? #43.