3 Theories About How Jon Snow Will Return to Game of Thrones

Warging is what happens when a person's consciousness is transferred into another living creature. We've seen Bran warg into both a direwolf and into Hodor. Orell, the wildling, also warged into an eagle during his fight with Jon. What I'm establishing here is that this is definitely a thing. While Jon may be dead as a doornail, it's possible that he warged into his direwolf, Ghost, before dying. If this is the case, how would he get out of Ghost now that his body is dead? Would he need to warg into a different person, and if so, who? Or, will he be stuck in Ghost for the rest of his days?