So, this review is less about this movie (which looks absolutely abhorrent) and more about some manga that have not been reviewed here which are definitely not for kids but also fairly good. Here is a list:
Berserk:Probably the most violent and dark fantasy manga ever written. Anyone who believes this is for kids is a complete idiot.
Attack on Titan: This series is sort of like a manga version of the Walking Dead, except with giant deformed humanoid beings called Titans instead of zombies and swords with jetpacks instead of guns.
Fist of the North Star: Post-Apocalypse set in the 90's. Heads-explode from karate. Completely ridiculous. YOU WA SHOCK!
Gyo: In this story by Junji Ito, fish come up from the see in this manga, and kill people. Absolutely horrifying and yet still darkly humorous if you consider how ridiculous it is.
Uzumaki: Another one by Junji Ito, spirals decide you should be afraid of them. Very, very afraid.
Hopefully, you can review at least some of the items on this list. At the very least, review Attack on Titan, considering how new it is. Or if you want to, you can review the anime adaption of Attack on Titan. As for this film, these are all much more worth your time and money.