MTG Salvation

Something that I was interested in for a long time was whether or not it would be possible for Emrakul to corrupt a planeswalker or not, cause on Innistrad Jace was losing his mind so I am guessing that it is certainly possible, but what would happen after that? Would the planeswalker lose their spark because they became mindless, I don't think that that is the answer because the people of Innistrad while corrupted still retained a modicum of self awareness, or would they just turn into an insane being who is eldrazified and can plainswalk? I just sort of though of this recently and haven't seen anyone talking about it, so I just wanted to make this to see what other people though could happen in this situation.