Poltergeist II: The Other Side (1986)

Continuity mistake: After the father drinks the 'devil' thing in his bottle of wine, he heads to the bathroom where the mother and Carol Anne have just had a bath and hairwash. When the mother realises there's something not right with the father, she sends Carol Anne - with soaking wet hair - out of the bathroom. As the father starts getting aggressive and saying hurtful things about Carol Anne, she comes to the bathroom door looking really upset - and her hair is bone dry.

Trivia: Unbeknownst to the cast and crew, several of the skeletons ordered for the production were real human skeletons (as opposed to replicas). When this was discovered, some crew and cast members demanded an exorcism or cleansing be performed on set, as they had already been feeling uneasy on-set before learning this, and felt the real skeletons may have brought some unwanted spirits to the set. Co-star Will Sampson, who like his character was a real-life shaman, offered to return to set one night after everyone else went home in order to perform an exorcism ritual. Reportedly, the mood and feeling on set greatly improved afterwards.

Question: Why did Kane want to abduct Carol Anne so badly and what would he have been able to do if he succeeded?