Unforeseen personal circumstances have forced Jason Momoa to cancel his upcoming appearance at Wizard World.

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The comic convention, now entering its 22nd year, will, unfortunately, kick off on Thursday, August 22 at the Donald E. Stephens Convention Center without an Aquaman.

However, the loss of Momoa is more than made up for by the addition of another DC movie superhero, Zachary Levi. Levi starred in the box office smash, Shazam!.

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Levi isn't the only one just added to the bill at Wizard World. Jeff Goldblum notably from The Fly, Independence Day and Jurassic Park along with Steve Guttenburg from Police Academy, Cocoon, and Three Men and a Baby were both added to the show.

Check out the full list of all the currently scheduled guests, with ticketing information at wizardworld.com/comiccon.