In other words, it sounds stupid to me. Why does it have black blood? Does it breathe a different mixture of chemicals than the 'normal' Predator to make its blood black? Why?
Maybe they're a sub-species of Predators that have made their home on a planet with a different atmosphere for a long, long time and subsequently this sub-species adapted. That doesn't sound absolutely retarded, does it?
But
why?! Predators are badass as it is! What do we need Super Predators for? Wolf (the Predator from AvP:R) pretty much proved (in a somewhat silly way) that Predators can be moar kickass than what we've seen before. No need to suddenly change fundamental things about the species. Except that... Wolf seems to be acid-proof. Nevermind that, though. I'm just rambling about why I think it's silly.
