Granted, it wasn't an amazing movie, it's two redeeming qualities were how good looking they made the past (clothes, tattoos, ornate decorations, Italian language, etc) and just how thought out the nuances of the two opposing groups were; but, it also wasn't a typical hollywood algorithim-following-cookie-cutter-one-and-done movie. As soon as it ended I actually started watching it again, not because it was that good, but because it's been that long since I've seen a movie with an original storyline.
True, I'm sure the storyline is anything but original for people familiar with the game franchise, but I'm not. I played Black Flag for like..a day...once. It was fun, but the storyline didn't make sense to me...now it does...and now I actually want to know more about it.