In the climax, the Avengers face off against Loki and his alien army in an epic battle in New York City. The Chitauri, the alien race allied with Loki, launch a full-scale invasion, and the Avengers must work together to prevent the destruction of Earth.
In the resolution, the Avengers successfully thwart the Chitauri invasion. Tony Stark (Iron Man) intercepts a nuclear missile headed for Manhattan and takes it through the wormhole, sacrificing himself to destroy the Chitauri mothership.
However, Stark survives the ordeal, and the team regroups. Loki is defeated and taken into custody, and Thor takes him back to Asgard. The Avengers go their separate ways, and S.H.I.E.L.D. disbands.
In the mid-credits scene, it is revealed that the alien leader, Thanos, has been manipulating events from behind the scenes and is now determined to take matters into his own hands.
“The Avengers” concludes with a sense of accomplishment for the team but also hints at future challenges and threats that will require their collaboration. The film’s success laid the foundation for the Marvel Cinematic Universe, with subsequent films expanding the interconnected narrative.