i wa thinking because Ruby is turning sam evil and everything does this mean she is really bad?
i mean she new how to fix the colt, she had her knife. her blood turns sam really powerful and she got allowed back out of hell.
maybe she has some kind of secret mission, she has been backing sam since yellow eyes was killed,(was she even part of his plan?)
does she want to turn sam evil so he can be incharge, or does she want Sam to get lilith out of the way for her?
either way, i think shes going to die, or next season won't work.