AVENGERS (1963) #300

It's the tricentennial issue of Earth's Mightiest Heroes! And the all-out action begins in Central Park as Nanny places Franklin Richards in a red suit of armor and orders him to attack his parents! However with the recent arrival of Gilgamesh in Manhattan, the four heroes on the scene make short work of Nanny and Orphan-Maker and end their first crisis! But in the afterglow of victory, the demon lord N'astirh swoops in and grabs Franklin! So now Reed and Sue have to find their son all over again (and battle the Inferno demons wreaking havoc in New York City along the way)! During the search for Franklin, the emerging team of Avengers gains three allies! The Mighty Thor, the Growing Man, and Kang the Conqueror! Is Kang going to help his long-time foes? Yes, but only to ensure his own survival! Once the Growing Man leads the quintet of super-heroes to the World Trade Center, the final fight for Franklin takes place! The Captain, Gilgamesh, Thor, Mr. Fantastic, and the Invisible Woman vs. N'astirh and his demon horde! Atop the twin towers, will a new team of Avengers rise up from the ashes of Inferno? And restore the glory of days gone by? Avengers Assemble!