What If…?

What If…? is an American animated anthology series created by A. C. Bradley for the streaming service Disney+, based on the Marvel Comics series of the same name. It is the fourth television series in the Marvel Cinematic Universe (MCU) produced by Marvel Studios, and the studio's first animated series. The series explores alternate timelines in the multiverse that show what would happen if major moments from the MCU films occurred differently. Bradley serves as head writer for the first two seasons, with Bryan Andrews directing.

Jeffrey Wright stars as the Watcher, who narrates the series, alongside many MCU film actors reprising their roles. Marvel Studios was developing the series for Disney+ by the end of 2018, with Bradley and Andrews on board. It was officially announced in April 2019. Marvel Studios' head of visual development Ryan Meinerding helped define the series' cel-shaded animation style, which was designed to reflect the films and take inspiration from classic American illustrators. Animation for the first season is provided by Blue Spirit, Squeeze, Flying Bark Productions, and Stellar Creative Lab, with Stephan Franck as head of animation.

The first season of What If…? premiered on August 11, 2021, and ran for nine episodes until October 6 as part of Phase Four of the MCU. A second nine-episode season is expected to premiere in early 2023 as part of Phase Five, and a third season is in development. The series has received generally positive reviews, with praise for the voice acting, animation, creative storylines, and scenarios, although the episode length and writing received some criticism. A Marvel Zombies series, based on one of the What If…? episodes, is in development.

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