Former WWE Universal Champion Roman Reigns was scheduled to make an appearance at the ACE Comic Con in Arizona next month, in what would have been his first official booking since announcing that he was battling Leukemia.

The ACE Comic Con Twitter account sent out a message on Friday evening stating that “due to a change in his schedule,” Reigns would no longer be able to attend the event. Anyone who purchased tickets and packages to meet the Big Dog will receive an automatic refund.

WWE will still have a presence at the event, however, as Smackdown Women’s Champion Becky Lynch as well as her rival Charlotte Flair will both be available on Jan. 11th for autographs and photo ops.

Unfortunately, due to a change in his schedule, Roman Reigns is no longer able to attend ACE Comic Con Arizona on January 11th. All purchases for Roman Reigns items will be automatically refunded. We apologize for any inconvenience.

— ACEcomiccon (@ACEcomiccon) December 7, 2018

Get excited @WWE fans! @BeckyLynchWWE will be attending #acecomiccon AZ on January 11th! Get your VIP packages, Photo Ops, & Autographs now! #wwe #SmackDown

— ACEcomiccon (@ACEcomiccon) December 1, 2018

Hey Arizona, I'm coming for you! Join me @acecomiccon on Friday, January 11th @gilariverarena for great start to the year! There are VIP Packages, Photo Ops, & Autographs available now. Reserve yours here: See you soon! #acecomiccon

— Charlotte Flair (@MsCharlotteWWE) November 16, 2018