-Snyder makes Man of Steel and it's decent but not without controversial choices. Great casting. Maybe the sequels will be better.
WB PANICS AND WANTS SOME OF THAT AVENGERS PIE
-Snyder is forced to make BvS rather than a standalone sequel to further grow the Superman character and WB neuters it's already overly complicated plot (because Snyder has to shove an MCU worth of films into one to introduce both Batman and WW) into a mess. Ultimate Cut is better but still, what could've been if they had been allowed to give the characters their own individual films first.
-WB POOPS ITSELF AND RECUTS SUICIDE SQUAD TO HELL, FINAL PRODUCT IS AN INCOHERENT MESS
-Snyder is going ham on his JL when WB PANICS AND WANTS SOME OF THAT AVENGERS JUICE and is replaced for Justice League because Whedons hahas are better than Snyder's (at least thematically consistent) murderverse
-JL IS TRASH
- Well, there's another version of the movie mostly done and so, out of curiosity, perhaps respect to the creators and actors, and because Snyder's movies were enjoyable to some, some fans want it Released
If you're laying everything at WB's feet, issue #1 was "Hiring Zack Snyder to head up their cinematic universe."
Snyder could have made a passable Spectre or Hawkman movie or something. Hiring him not only to do Superman, but to establish the tone and themes of the entire franchise was crazy pants.