They believe that somewhere there is a full version of the Zack Snyder cut of the movie, that Warner Bros. is refusing to release, possibly just to piss them off.
Some of the more passionate Snyder Cut acolytes have taken to hitting up the AT&T help account on Twitter, and requesting they release the (very-much-never-finished, obviously) Snyder cut.
They’d probably love to hear about how you want to see the Snyder Cut!
There are those who believe Justice League was a disaster, a doomed production that not even two major Hollywood directors (first Zack Snyder, and then Joss Whedon) could salvage.