There is still no official word on if the Snyder Cut will be confirmed as canon within the DCEU, although Snyder has described it in past interviews as taking place in a sort of “elseworld” away from the main story. Should this report from Kevin Smith prove otherwise, it would be a monumental win for Snyder after putting in so much work simply to get this release off the ground.
Comic book movie personality Kevin Smith, while speaking on his Fatman Beyond podcast, revealed that he knows the ending of Zack Snyder’s Justice League and that it does, in fact, open the door for more stories. Smith’s quote is in response to recent rumors that DC executives see this movie as a “storytelling cul-de-sac” that is unlikely to bring more DC stories to life.
“I happen to know that the ending that he’s got for the Snyder Cut is very not a cul-de-sac, it takes it to a weird neighborhood, but it’s not a cul-de-sac. You can keep f-ing going with the story based on what I’ve heard from a friend.”
As of now, Joss Whedon’s theatrical cut is still regarded as canon, considering its events are referenced in movies released after it, such as Jason Momoa’s Aquaman. However, with the DCEU bringing the multiverse so heavily into play, there are no limits to what could happen with the Snyder Cut in relation to the core story already told.