That movie kinda looks cool.
Anyway, I like this series. I've been reading the manga but haven't seen any of the anime.
As for Hancock joining the Straw Hats, I think he'd be open to it if Hancock ever got the courage to ask or if old lady Nyon explained that Hancock would literally die if she didn't go with him. I find it amazing that she was able to keep her composure with Luffy hiding where he did when she was boarding the Navy ship. Since she seems to have fallen so hard and is currently hiding in a corner of their room daydreaming about feeding Luffy and stuff.