It's been a rocky road for the DC Extended Universe. From the dizzying delights of Wonder Woman to the hyper-colour mess of Suicide Squad. From the delicious ridiculousness of Aquaman to the dark and sloppy disaster of Batman v Superman: Dawn of Justice. And it's hard to forget what should have been their crowning glory but was perhaps their worst misstep with Justice League. Constantly compared to their rivals at Marvel Studios (a reminder it's okay to like both cinematic universes), it's been a case of one step forward,...