Well, that was interesting. The low frame rate was terribly distracting but I got over it eventually.
DAMN, this thing is violent. Super super violent. The viking one was the worst, girl vikings wading through giant men with ease and an old(ish) lady and her wonder shields able to slice through anything. The samurai one was good, fun choreography for the fights, especially the initial ninja attack. The plane one was the most original and creative, I thought, and Michael Biehn FINALLY enters the hallowed pantheon of "killed by Predator, Terminator, and Alien".
The ending is a bit silly. Slight spoilers so presumably Dutch, Harrigan, and whoever survived Predators and The Predator are in there as well, along side the Prey chick?