In the same universe as the Underworld trilogy including Marvel's the Underworld, The Underworld: Darkened, and The Underworld: Foreverland we see this new film taking place 5 years after it with an already established Marvel Universe. When Loki comes to Earth from Asgard to rule it after Thor was chosen over him by Odin to rule Asgard, Earth's mightiest heroes including Captain America, Iron Man, Falcon, Antman, Hawkeye, Black Widow, and Hulk come together to fight him while Thor and his army also come to Earth to take Loki back to Asgard. After failing to beat him the first time the Avengers team up with Thor to try once again and end up winning. The Asgardians take Loki back to Asgard while Thor stays on Earth after meeting and falling in love with a paramedic named Jane Foster. The movie ends with Thor joining the Avengers and in the post credits scene we see Nick Fury talking to his lawyer Matthew Murdock about bringing the Defenders back for one more mission.
