What If... is a Marvel Cinematic Universe animated anthology half-hour series. Like the comic book, it is an alternative universe exploration of "what if this happened instead of what happened in the main universe?" The nine episodes in season one:

1. "What If... Captain Carter Were the First Avenger?"
2. "What If... T'Challa Became a Star-Lord?"
3. "What If... the World Lost Its Mightiest Heroes?"
4. "What If... Doctor Strange Lost His Heart Instead of His Hands?"
5. "What If... Zombies?!"
6. "What If... Killmonger Rescued Tony Stark?"
7. "What If... Thor Were an Only Child?"
8. "What If... Ultron Won?"
9. "What If... the Watcher Broke His Oath?"

Sometimes the universe is much the same, sometimes it's better and sometimes it's worse, very worse. But what's really cool is the last two episodes where we have a universe where Ultron wipes out life in his universe, discovers the Watcher, decides to wipe out life in all the universes and the Watcher recruits some of the heroes and villains from previous episodes to battle Ultron.

Voice acting is good, often using the original actors (and maybe Chadwick Boseman's last MCU role after his death from cancer in 2020). Animation is all right and the stories are mostly entertaining (I'm not so much into bad ending stories). Overall a good animated series.