Mysticism

Too general a question. There are a lot of things there and not just incarnations (which I don't know if appear in the Zohar). It is certainly possible that there are things that are incorrect. I don't think this is a Sinai tradition or any prophecy. At least these details are mainly people's spiritual intuitions. What makes sense to you or not has limited status. If it's reliable information then your feelings don't really matter. If not – then don't accept it. There is no proof for anything. But it is not true that what cannot be proven is not true.