The almighty world-eater Galactus is one of Marvel's most iconic figures, and this all-new series explores the possibilities of other Marvel icons serving as his cosmic herald! To save his planet, Norrin Radd surrendered his freedom to become the Silver Surfer, cosmic-powered herald to the world-devouring Galactus, one of the most feared beings in all of existence! But what if Galactus recruited some of Marvel's best and brightest heroes as his new cosmic heralds instead? See how the Power Cosmic transforms these once-familiar champions, twisting and turning all of Marvel history in their wake! Rocket into space along with Hulk, Rogue, Gambit, Spider-Gwen and Moon Knight - it's going to be a bumpy ride! Collecting: What If? Galactus #1-5