I wish I knew what exactly AT&T/WB think they’d have to lose if they released Zack Snyder’s version of the movie. As I’ve said many times already, they wouldn’t even have to spend anymore money on it. They could just release the assembly cut as an HBO Max exclusive. That would actually be a pretty smart way of goading people into signing up for the service. As a bonus, they’d no longer have to worry about people constantly bugging them about it and they’d actually generate some goodwill.
Hell, they already went through the trouble of putting together a “Donner Cut” of Superman II, despite having less to work with.