What if Peggy Carter becomes Captain America, and Bucky Barnes fights a zombie Captain America while prince T'Challa from Black Panther becomes Star Lord? These and other similar possibilities were teased by Marvel President Kevin Feige as he introduced the studio's first animated series, What If...? at D23 Expo in California.

Feige said the series, to be launched on Disney+, will explore different possibilities in the 23 movies from Marvel Cinematic Universe (MCU) and will also feature voices of almost all the actors, who have worked in the films from the studio.

"'What If...? is based on comic stories we have loved for years where they take a storyline you know and change one element and see how things could get different. The 23 films of MCU are going to showcase one little difference in each episode and see how things change," he said.

The series will be streamed on Disney+ in 2021.