While this trailer has nothing to do with Haim Saban’s upcoming Power Rangers movie (in which Roberto Orci is playing a lead role, so magic blood is almost ensured to somehow play a role) they’re certainly taking it seriously enough to threaten legal action against its creators.
That being said, Power/Rangers is an interesting take on the characters because it takes the material deadly serious–which is interpreted in the trailer with a lot of cursing and head shots. Lots and lots of head shots–though it also shows how silly the Ranger’s costumes are, which is a direct result of the fact that that they were designed for children, not adults.