Honestly, I'm hoping for something of an antagonist role for Hoid! I think he would make a really interesting villain. What's killing me is wanting to know his motives uGH--
Also, never forget how uneasy Hoid made Vin feel. I dunno about you guys, but I trust Vin Instincts™ and when my girl won't even get near someone (literally runs the other way) me thinks that's some kind of heavy hinting/foreshadowing.
BUT who knows! Maybe I'm just too suspicious of Sanderson details.