"Iron Man, Thor, the Hulk and the rest of the Avengers unite to battle their most powerful enemy yet -- the evil Thanos. On a mission to collect all six Infinity Stones, Thanos plans to use the artifacts to inflict his twisted will on reality. The fate of the planet and existence itself has never been more uncertain as everything the Avengers have fought for has led up to this moment. SPOILER: Thanos and his Children - Proxima Midnight, Ebony Maw, Corvus Glaive and Cull Obsidian - have attacked the Asgardian ship in search of the Space Stone, which is housed in the Tesseract that Loki had stolen before Asgard's destruction. With Thanos already possessing the Power Stone after decimating Xandar, Thanos' army swiftly defeats the Asgardians. After a futile counter-attack from the Hulk, Loki offers the Tesseract to Thanos in exchange for Thor's life - only to be killed himself when Thanos anticipates Loki's attempt to betray and kill him. Heimdall uses the power of the Bifrost to send Hulk to Earth before Glaive kills him. Thanos and his Children then depart just as the ship self-destructs, leaving a mourning Thor behind.
Hulk crash lands at the Sanctum Sanctorum and is reverted back to Bruce Banner, who informs Stephen Strange and Wong about Thanos' impending arrival. Strange and Banner retrieve Tony Stark and brief him about the Infinity Stones and Thanos. Maw and Obsidian arrive in New York to seize the Time Stone from Strange, and Stark, Strange, Wong and Peter Parker confront them as Banner is unable to transform into the Hulk, having been traumatized by his defeat by Thanos. Maw incapacitates and captures Strange; Stark and Parker pursue his spaceship while Wong stays behind to protect the Sanctorum and Banner contacts the rest of the Avengers."