Writer: Roy Thomas
Penciller: John Buscema
Inker: Frank Giacoia
Letterer: Mike Stevens
Featured Issue: Avengers #85
Having defeated Arkon and Enchantress, the Avengers seek to return to their home dimension. Wielding his magical uru hammer, Mjolnir, Thor calls upon the power of Odin to summon a portal which will transport the Avengers and their mansion home. Black Knight is the first to arrive home, or rather from his point of departure, Stonehenge. His mission accomplished, Black Knight returns to his manor while wondering if the rest of his teammates have made it home safely.
Back in New York Thor and Black Panther find themselves returned safe and sound as well. Noticing that Avengers Mansion has also returned, the pair enter the headquarters in search of their compatriots. Unfortunately and rather curiously the remaining Avengers are not where they should be. Just as they begin to wonder what may have happened to their comrades, Black Panther realizes that both men are late for an important engagement. Rush across New York they manage to arrive in the nick of time in order to pass out toys to under privileged children as part of the Toys for Tots program. Although they find it wonderful to be able to spread so much joy, Thor and Black Panther are troubled by the absence of their friends and cannot help but wonder what has happened to them.
On a street not unlike the one that Black Panther and Thor arrived on, the remaining Avengers arrive bu find themselves failing to materialize fully. At first it is thought to just be Vision, but on closer inspection all four Avengers suffer from the same affliction. Having orientated themselves to their new condition, the Avengers look around their new surroundings to find a scene of abject horror. As a man runs through Quicksilver, the team finds that the world around them is rapidly dying from extreme heat. They quickly identify that the sun is responsible, somehow being dramatically hotter and brighter than normal. The results are utterly devastating. People collapse in the streets while the asphalt smokes and melts around them. Even more shocking is that when Quicksilver finds a newspaper, the Avengers discover they are several days in the future. Not knowing what else to do, Scarlet Witch uses her hex powers. The unexpected chain reaction again sends the Avengers hurtling through time and space, returning them back in time to the day they left. Determined to figure out and prevent the cause of the fate they just witnessed, the Avengers return to Avengers Mansion to regroup.
Upon arriving at the mansion, all is not well. As Quicksilver enters through the front door, he is attacked by an automated defense system that the Avengers have no memory of installing. The team is given little time to think about the occurrence before they are confronted by Nighthawk, member of the Squadron Sinister. After a brief encounter with Vision, Nighthawk, who has no memory of the Avengers, acknowledges that he is severely outnumbered and quickly retreats through a hidden door. Looking to pursue Nighthawk, Goliath prepares to smash the secret door when he is forcefully stopped by Vision. Using his ability to pass through walls, Vision opens the door from the other side, revealing a hidden explosive device, set to detonate if anyone tried to force the door.
Rushing down the secret corridor, the Avengers are stunned to find an entire team of costumed supers waiting for them at the other end. After trading a series of barbs, the two super powered teams rush headlong at one another. In the middle of the battle, another member of the Squadron Sinister, Dr. Spectrum, attempts to make contact with the headquarters of the Squadron Supreme in Cosmopolis. Dr. Spectrum announces that the Brain-Child One rocket is one hour from lifting off on its solar orbit journey. This discontinuity, paired with the information about the rocket force Vision to only one conclusion, that the Avengers have arrived in yet another parallel dimension, one where the Squadron Sinister are not villains, but in fact the super heroes of the Squadron Supreme. Not only that, but that this Brain-Child One rocket is most likely responsible for the solar catastrophe they so recently witnessed. With this, the Avengers change their strategy and attempt to disable the Squadron Supreme so that they can talk and determine where the rocket launch is taking place in hopes of stopping it before it’s too late.
While the Squadron Supreme puts up a good fight, they are eventually beaten down by the superior might of the Avengers. Leaving all of the Squadron members except Nighthawk in the mansion, the Avengers depart on a mission to find the rocket launch site. When Nighthawk regains consciousness in the middle of their flight, the Avengers explain the situation to him. Unable to explain why, Nighthawk believes their story and directs the Avengers towards the launch site, hoping desperately that they will arrive in time to stop Armageddon.