At this year's San Diego Comic-Con, Marvel Studios announced their upcoming animated series What If...? as part of the Phase Four of the Marvel Cinematic Universe. This will be the first animated project officially part of the popular universe.
Based on the popular line of comics, What If...? will explore various possible alternatives in the Cinematic Universe. Kevin Feige has continuously teased that one idea will be if Peggy Carter, not Steve Rogers, got the Super Soldier Serum.
At the panel, it was announced that Jeffrey Wright, of Casino Royale and The Hunger Games fame, will play Uatu the Watcher. Similar to the books, Uatu will introduce the possible universe narrating the episodes. In addition, they announced that many MCU stars will return to their roles including, but likely not limited to, Michael B. Jordan, Sebastian Stan, Josh Brolin, Mark Ruffalo, Tom Hiddleston, Samuel L. Jackson, Chris Hemsworth, Hayley Atwell, Chadwick Boseman, Karen Gillan, Jeremy Renner, Paul Rudd, Michael Douglas, Neal McDonough, Dominic Cooper, Sean Gunn, Natalie Portman, David Dastmalchian, Stanley Tucci, Taika Waititi, Toby Jones, Djimon Hounsou, Jeff Goldblum, Michael Rooker, and Chris Sullivan.
The series will begin airing in the summer of 2021 exclusively on Disney+.