Anthony Mackie, Oscar Isaac, Simu Liu and other Marvel stars return for the final season of “What If?” from Marvel Studios.

LOS ANGELES — Marvel’s series “What If…?” is back for its final season and the new trailer highlights the unique encounters these heroes will face.

The animated series explores the possibilities within the Marvel Cinematic Universe and this season takes things to the next level with new characters, new genres and bigger shows.

Join the Watcher, voiced by Jeffrey Wright, as he guides you through episodes set in cowboy-themed worlds, Avengers in Power Ranger-like robots, and one in which Storm wields Thor’s hammer.

Marvel stars you know and love will also return to voice their characters, including Anthony Mackie as Captain America, Mark Ruffalo as Bruce Banner, Sebastian Stan as Bucky Barnes, Simu Liu as Shang-Chi, Haley Atwell as Peggy Carter and many more. further.

The trailer reveals three clones of The Watcher looming over our heroes and an ominous warning is declared: “This is where your story ends.”

Prepare for one last viewing when “What If…” The third season begins streaming December 22 on Disney+, with a new episode daily for eight days.

The Walt Disney Company is the parent company of Disney+ and this ABC News station.