Every era in every art forms, there must be some bolder artists who do trial and errors on hybrids to test what work what doesn't work. That's how we got the current rock genre from the previous rock and roll.. when musicians dared to turn up the volume until the amp was distorted. I feel like this is one of those trials.
I was hopping more of a superhero gone rogue but it turn out to be superhero (SAW) edition. Too much gross killing and horrid display in the movie, I personally feel that it becomes a bit too much like the director is venting out his fustration in the movie. Definitely don't find the breaking of jaws or gorging out the eyeball being tasteful. Definitely keep your kids far away from this movie. Watch at your own risk
Don't waste your time and money watching this shit show. It's slow and it doesn't even end with an explanation i.e. which world the boy came from. Like the others that have mentioned, it's just a kill fest. You cross him, he kills you. Nothing else. Boring as hell.