ALEX JANE.
He fits what we KNOW about him. It would make sense, he is pretty much the only one we KNOW who is nearly as talented as patrick. we saw him before season 3 finale. It seems to have a sense of 'fitting' in my mind, and has a planted seed which is just enough under the surface to surprise us...? i am no certain but why not!? Patrick ran off from him to be with his wife and children and plus, the carnival excuse would still fit! (or else, it may not be his father, but a step brother partick doesn't know about, trained by his possible deceased father to hate Jane as he was never 'as good as Jane' We saw how forceful his father was, and how he persuaded Patrick to do things he hated. It is in a sense a quite poetic solution. this could possible just squeeze into the timeline. It is a big jump,, and i am merely wondering. I just hope it isn't one of the 7... it would be a little bit of a letdown!