Snyder is currently assembling an extended director’s cut of the 2017 superhero thriller, after Whedon stepped in to take over direction partway through the making of the original.
The so-called “Snyder Cut” will be released on US streaming service HBO Max.
Talking on an online Justice-Con panel which was organised by fans, Snyder said he ”would destroy the movie” before using any of Whedon’s segments.
“I would set it on fire before I use a single frame that I did not photograph. I would literally blow that f***ing thing up,” he continued.
The filmmaker recently confirmed that the film would last over 214 minutes – almost four hours – making it nearly double the length of Whedon’s critically panned original.
Snyder said it was “exciting to bring all this new material to the fans”.
Justice League actor Ray Fisher, who played the character of Cyborg, recently accused Whedon of “gross” and “abusive” behaviour on the set of the film.
Fisher wrote on Twitter that the “on-set treatment of the cast and crew of Justice League was gross, abusive, unprofessional, and completely unacceptable”.
The Independent reached out to Whedon’s representatives for a response to the comments.