My gut says he is after Tippett or Blashill, and he has to wait on both. I do think if he wants NHL head coaching experience, and he's not waiting on Tippett, he goes with Vigneault. Willie Desjardins could still be in play here as well.
One thing is for sure, and Heika confirmed it, Nill is playing his cards close to the vest and is not leaking, or allowing anything to be leaked, about the search. It's being conducted well outside of the media spotlight.