The only way I will ever accept the BSPs are if the following is done..
1) Fox, Antal or Rodriguez say that it's just ONE clan doing this. Though this is highly unlikely that they will say this.
2) Fox, Antal or Rodriguez say that this is a clan of Bad Bloods, even though there are a few scenes to imply this, some confirmation would do some good. Again, highly unlikely.
3) An explaination is given as to why there are BSPs at war with normal Predators. Something of a backstory, something to give a good reason as to why they are doing this rather than just the "Each time one of their kind loses, they upgrade themselves" bull crap. Is it just one clan doing this, is there something of a war between tradition and progress, what? Tell us why BSPs are killing normal Predators. Again, highly unlikely.
So far, I like Keylight's and MysticNinja's explainations. Personally, I detest the idea of BSPs, and would've prefered normal bad bloods than these abominations (I use the term to describe what they are implied to be in the script, genetic abominations). Had Rodriguez and Antal go with the Bad Blood angle, I'd probably be for this upcoming film.
Thank you for sharing your theories and speculations, Mystic and Keylight.
-Rakai'Thwei