Marvel's first animated series 'What If?' teases endless possibilities

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?
"'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