Normally don't vote high on previews...but....
It's kind of a shaky rule with me that I don't vote high on previews, but this is just so cool, it not only acts like a cool opening, it's pretty self-worked in and of itself. The character design was a little iffy to me at first, but it really grew on me as soon as I saw the way you moved them; very cool. Your music choice totally rocks. I love it, it somehow fits the opening (at least to me) like a glove. And a lot of that has to do with your great sense of style in putting that opening together. Very Cowboy Beebop/Inuyasha. Just watch out for reviewers like RancidPsychoJosh who would just love to thrash this for even having a trace of anime in it. But who cares, with such a nice output of style and creativity, you really did a great job with this. Excellent work, can't wait for finished stuff to roll in.