Avengers: Endgame is a 2019 superhero film and the culmination of the Marvel Cinematic Universe's Infinity Saga. Robert Downey Jr. reprises his role as Tony Stark/Iron Man, leading the Avengers in their final battle against the villainous Thanos. The film explores the aftermath of the devastating events of Avengers: Infinity War and provides a satisfying conclusion to over a decade of interconnected storytelling. Downey Jr.'s performance in Endgame is widely praised as one of his best, showcasing the emotional depth and growth of his character.