Marvel Studios’ What If…?, which was announced back in March, is a brand new upcoming TV series that will be streamed exclusively on Disney+. The series will expand the Marvel Cinematic Universe in all sorts of new ways by posing the question of “what if?” This really isn’t anything new considering that Marvel Comics has an entire comic line dedicated to hypothetical and alternative stories, like “what if Thanos had joined the Avengers?” or “what if Captain America joined hydra?”

And now we have an idea of who will be involved. While at San Diego Comic-Con, Marvel Studios president Kevin Feige shared some news about the show, which includes announcing that Jeffery Wright will be voicing The Watcher, and various actors and actresses who have appeared in Marvel films who will be reprising their respective roles. More on all of this below.

THR’s Borys Kit took to Twitter to share some of the exciting news about What If…?:

Feige announces WHAT IF…? animated series. Will have many of the movie stars reprising roles in stories of different reality spin. Jeffrey Wright voicing the narrator, The Watcher.

— Borys Kit (@Borys_Kit) July 21, 2019

Now, this will be Marvel’s first foray into the animated world. So it will be interesting to see what kind of animation style will they be using; will it be traditionally hand-drawn animation or will it be computer generated? While the style that will be used is still unknown, Marvel shared a photo of the cast that will be involved.

Here’s a photo, courtesy of Peter Sciretta of /Film, of the actors and actresses who will reprise their roles:

Actors reprising their roles pic.twitter.com/HOr4qZQHfc

— Peter Sciretta @ SDCC (@slashfilm) July 21, 2019

As you can see, the series will bring back characters like Kilmonger (Michael B. Jordan), Thanos (Josh Brolin), Arnim Zola (Toby Jones), Korath the Conqueror (Djimon Hounsou), Taserface (Chris Sullivan), and Yondu (Michael Rooker). By bringing these characters back, it will reinvent the mythology of the MCU.

Other characters include Hulk (Mark Ruffalo), Nebula (Karen Gillan), Nick Fury (Samuel L. Jackson), T’Challa (Chadwick Boseman), Scott Lang (Paul Rudd), Hank Pym (Michael Douglas). Even The Grandmaster (Jeff Goldblum) will be in it.

And it doesn’t stop there. Characters who have their own streaming shows will be a part of What If…?, like Hawkeye (Jeremy Renner). And Thor stars Chris Hemsworth and Natalie Portman will be a part of the fun.

Marvel’s What If…? arrives on Disney+ in summer 2021.

Click right here to for much more from San Diego Comic-Con 2019!

Just announced in Hall H at #SDCC, Marvel Studios’ WHAT IF”¦?, the first animated series in the MCU, with Jeffrey Wright as the voice of The Watcher and many actors from across the MCU reprising their roles as voice talent. Streaming exclusively on Disney+, Summer 2021. pic.twitter.com/el6etc3xZH

— Marvel Studios (@MarvelStudios) July 21, 2019