With the arrival of the red skies perhaps coming to life in Justice League’s expensive reshoot phase, it could indicate that Warner Bros. and DC want to use the essential DNA of Crisis on Infinite Earths to cause a massive status quo shift in the DCEU that will ripple through the upcoming solo movies.
Though an informal term, “red skies” typically imply a major DC crossover event — with the name originating in the seminal 1985 Crisis on Infinite Earths storyline by Marv Wolfman.
With that comparison in mind, let’s explain why the red skies are so crucial in a DC context.
The basic plot of the story isn’t necessarily relevant because Justice League doesn’t look remotely close to a straight adaptation of the tale.