Superstar creator Walt Simonson returns to draw the Hulk and Thor! When Bruce Banner takes his lab team to Jotunheim, it can only mean one thing: Hulk vs. Frost Giants! Thor joins the fray, but what's wrong with the God of Thunder — and why doesn't he recognize Hulk? As the Frost Giants prepare to invade Earth, not even Hulk and Thor can stand in their way — so they'll have to call in some help. Plus, the secret of the Portal to Jotunheim is revealed, as Bruce Banner lands a bombshell surprise on his assistants.