1) It’s by the same guy who brought you Dawn of the Dead and the 300 and Watchmen.
2) Because it’s visually stunning! Look at it!
3) Because those ladies are going to kick some ass, probably in some sort of really overt, third wave, look-at-us-kicking-things-in-sexy-leotards way, but that’s not a bad thing.
4) Because Jon Ham has a small role.
5) Because mental asylums are just the creepiest, best places to set movies, ever.