If you loved Alien vs. Ninja, try Loups=Garous
A bridge between a film you've already seen and one most people haven't. Loups=Garous has roughly 4.2× fewer votes than Alien vs. Ninja — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theysit in Horror / Science Fiction / Thriller territory. If that's the register that drew you to Alien vs. Ninja, the second film will land in a comparable space — through a different lens.
What Loups=Garous is
Skyscrapers. Murmured warnings + wind through mesh. Society sealed into digital echo chambers, and children now congregate only at school. A serial killer breaches the classroom walls. Three girls find themselves caught in the widening gyre of a terror investigation. Fujisaku's anime offers a clinical gloss on techno-paranoia.

