2Earth's Mightiest Heroes and Marvel's First Family share some of their greatest adventures First, it's the battle of the century - the Hulk vs. the Thing And it'll take the combined forces of both teams to stop the destruction Worlds collide again when Ultron-7 crashes Quicksilver and Crystal's wedding And the Avengers and the Fantastic Four each have roles to play in cosmic encounters with Annihilus and the Skrulls Then, on a break from the FF, Mr. Fantastic and the Invisible Woman actually join the Avengers for the Super-Nova saga The New Avengers and the Fantastic Four face the Kree - but why are Hank Pym and the Mighty Avengers breaking into the Baxter Building?

COLLECTING: FANTASTIC FOUR (1961) 25-26, 150, 255-256, ANNUAL 19; AVENGERS (1963) 127, 233, 301-303, ANNUAL 14; NEW AVENGERS: AAFES 1; MIGHTY AVENGERS (2007) 25-26