"Ethereal Revisionism"
Earth's heroes gather, having been brought together by Mister Fantastic to take care of a mysterious threat. They soon discover that their host is actually a doppelganger.
Dr. Strange, along with Galactus and his Heralds search the Universe for strange energy readings.
And after escaping from Mistress Death herself, Thanos along with the Infinity Watch arrive in New York to ask for the aid of Earth's heroes, just in time to witness the destruction of Four Freedoms Plaza.