Monochromatic blockbusters are all the rage, with Mad Max: Fury Road and Logan receiving black-and-white reissues in recent years. So it was only logical that Zack Snyder would anoint his new cut of Justice League worthy of the upper echelon of action movies with a second release that strips out the remaining color. One week after the release of the “Snyder Cut,” fans have yet another four-hour experience at their hands: Justice League: Justice Is Gray.