Superman's Resurrection

If you agree that Justice League feels rushed, Superman's resurrection is  a major factor, as Batman suddenly realizes out of the blue that he can use a Mother Box to resurrect Superman (come on, the thinking behind this idea is ridiculous).

But the scene was intended to play out differently. First and foremost, when the Justice League visits the Batcave, Bruce Wayne talks about his Knightmare, which prompts him to believe that his imagined evil Man of Steel is, in fact, a Kryptonian resurrected by Darkseid.

This is just the first step. Next, Cyborg realizes that Kal-El's DNA also contains foreign genetic material, the Codex that played such an important part in Man of Steel. It’s only after that that the scenes we saw in the theatrical cut can take place.

Yes, we actually need these scenes.