The Marvel Cinematic Universe has been a huge box-office force ever since its first film, "Iron Man," debuted in 2008.Eighteen years and 37 more films later, the MCU has experienced its fair share of ups and downs, both critically and commercially.This year's first MCU film, "Spider-Man: Brand New Day," has garnered strong early reviews, while the studio's most-anticipated film of 2026, "Avengers: Doomsday," is yet to come.We used Rotten Tomatoes scores to rank every single MCU project — including movies, TV series, animated series, and special presentations — from worst to best.See how each hero stacks up.
57 (tie). "Ant-Man and the Wasp: Quantumania" (2023)
Paul Rudd and Kathryn Newton in "Ant-Man and the Wasp: Quantumania."
Marvel Studios
Rotten Tomatoes score: 46%The best part of "Quantumania," the third installment in the Paul Rudd-led "Ant-Man" series, was Jonathan Majors' introduction as the MCU's next big bad, Kang, audiences and critics agreed — although, Majors' time in the MCU was short-lived as a result of his legal troubles.While critics had a tougher time with the miniature film, the audience score of 81% shows that fans had a good time with Scott, Hope, Hank, Janet, and Cassie down in the Quantum Realm."The general color-drenched too-muchness of it all might be tolerable if the plot wasn't such a by-the-numbers slog, alternating hyperkinetic action sequences with draggy recitations of exposition," wrote Decider's John Serba.
