Am I correct that there are only two dire wolves left? Ghost and Nymeria?
Well, since Ghost died north of the wall and his body wasn’t burned, I am pretty sure we’ll be seeing undead Ghost at some point. We know the others can raise horses (and in the books, bears and other creatures too).
Perhaps his connection to Bran would still remain in some form even as a wight. In the books, there is a wight named Coldhands who is NOT controlled by the others, and it is never clearly explained why, but my favorite theory is that it is because he was loyal to Bloodraven in life, so that protected him somehow from being controlled by the others. So if Bran is going to be the new Bloodraven, perhaps the others raise Ghost but can’t control him because Bran’s powers interfere...