Anyway! The trailer comes courtesy of Active Anime and isn't embeddable, so I'm afraid you'll have to go there to watch it. And on top of that hassle, it's a tiny video! But it's the best we've got so far, so do check it out.
On a more critical standpoint...it's a very classic over-the-top martial arts flick so far, and of course they've changed a lot of the canon. Unlike so many franchises, however, one of the “rules” of the Blood franchise is that every creator needs to make their own mark on the basic concept, which is why Blood+ is so incredibly different from Blood: The Last Vampire, etc. In this version, Saya isn't even a full-blooded vampire-- she's half. (Go ahead. Make the Blade reference. You know you want to.)
So. What do you think? Do you want to see it?