Honestly, that is NOT a bad theory! I could see it. Because we know there HAS to be a point to the Hodor reveal, and this could be it. He's going to warg that guy on the tree, and get stuck there (in his mind). This also makes PERFECT sense with the theory that the WW's/NK are trying to prevent a prophecy of their own. Perhaps the NK is trying to get South, to kill Bran, before Bran wargs into the young human NK AGAIN. Like maybe history has repeated itself and he has been trying to kill this kid before he has the chance to do all of the things, over... and over... and over... if he succeeds, he can break the cycle (wheel?!) and if he doesn't, this shit is going to go down again... and again...
Edit just to add: It also fits perfectly with the line from Leaf when they're under the tree, when Bran comes out of the vision of the NK on the tree and he's like... "It was you. You made the White Walkers?" and Leaf flat out says, "We were at war. We were being slaughtered. Our sacred trees cut down. We needed to defend ourselves." Bran then says, "From who?" And she says, "From you." But then adds, "From men." MAYBE SHE IS LITERALLY TALKING ABOUT BRAN AND THERE IS MORE TO IT I CANNOT WAIT UNTIL FUCKING APRIL I'M GONNA CRY XD