Injustice is a neat fighting game that showed a world where Superman became an evil dictator leading a Regime and going into war with Batman and his Insurgency. When I heard of this film, I was excited, especially since this would be R-rated (and thus allow things DC Comics would not allow Netherealm Studios to do), I am disappointed at the final result.
The characters all have different voice actors from games, but.it is one of the few good things, as it has a good cast, but the writing is horrible. While the opening moments are almost true to the game, the the film strays too far from the source material, as certain characters who are key to the game's story end up being killed or choose different allegiances. Also, the movie feels like a rush job, clocking in at 71 minutes, which means some events had to be cut. I recommend playing the game instead of watching this failed adaptation.