This a good potential storyline?

Kristin Bauer reprise her role as Pam for Once Upon A Time playing a doppelganger vampire version of Maleficent. They're sworn enemies looking to kill each other. Pam kidnaps Lily to make Mal weak. Keep in mind, I'm not a True Blood fan but I have seen clips of Kristin as Pam. I'm also not completly sure if Pam is meant to be evil or just a bitch lol. I was just thinking they could make her a bit more evil while not be completely evil where her kidnapping Lily has a sole purpose other then making Maleficent suffer. Like she wants something in return. Like from what I heard, Pam has a thing for Alexander Skargsgard's character so Pam might think Maleficent is holding him hostage or something. I don't know if this is a good idea or not. I just know Kristin misses playing Pam so this might be a cool way for her to reprise the role. Hoping to god they plan to bring Maleficent back! I don't know why they haven't confirmed her returning. It should be obvious since they plan to reveal Lily's father!