In July 2020, "Justice League" actor Ray Fisher accused Whedon of showing "gross, abusive, unprofessional, and completely unacceptable" behavior toward the cast and crew of the film, even going so far as to invite Whedon to sue him for slander if he believed the allegations were untrue. A virtual panel for the 2020 at-home San Diego Comic-Con focusing on Whedon's work was canceled following Fisher's statements. The following month, it was reported that WarnerMedia had begun an investigation into Whedon's behavior during the production of "Justice League". Jason Momoa posted in support of Fisher, writing about "the shitty way were treated" on "Justice League" reshoots and saying that "serious stuff went down". In December 2020, WarnerMedia announced that its investigation had concluded and that "remedial action" had been taken.