bluethief: It did, and there were articles saying that inside the company there were factions, where one wanted Zack to make more movies, and the other to move in a different direction.
Zack himself seemed to hint at various interviews that we would not be back for more.
I don't blame him. Giving him a chance (and the money) to at least make the his cut of JL was huge, but overall working with WB on those comic book movies with suits breathing down his neck, trying to force a more Marvel-like universe at every turn must have been rough for a guy like Zack who, love him or hate him, has a very distinct vision and style and wants to do his thing and not be just a hack for hire.
Apparently he is now working on a movie that started as his pitch for Star Wars, but got rejected so he's making it into a whole new thing, kinda like it went with Riddick and the Alien franchise, and he's probably happiest starting his own new thing.
bluethief: It is rumoured that the upcoming Flash movie will reboot things, erasing Zack Snyder continuity. Also, there are rumours floating around that Henry Cavill will not return as Superman, and will be replaced by someone else.
I think the latest was that HBO was working on a tv series (mini series?) with a different actor, and Cavill is still, at least officially, the big screen Superman. I hope that's true. He is a way bigger name now than when he started as Supes, so they probably want to keep him, same as they are keeping Momoa as Aquaman and Gadot as Wonder Woman.