Surprise. Regardless of what I and other critics think of Snyder's movies, they keep getting made because there's a market for them. That said, Snyder has had a couple of box office flops at this point, so he's probably lost clout with the studio system and may have to bump back down to lower-level productions to pay those dues. Which is not about him personally, that's how the studio system works. If you helmed a couple of bombs, you go to smaller budget filmmaking for a while to rebuild trust with the studios.
There are exceptions. Scorsese for example can get just about anything greenlit because even if he puts out a few clunkers he'll still put out a masterpiece again sooner or later. Of course, few filmmakers have a filmography as full of classics and highlights as Scorsese. That kind of clout is real hard to come by and takes a long time to build up.