This is a backup theory if Melisandre doesn't revive Jon also this kinda explains why Kit said he won't be back for the next season.....
what if the crows throw Jon over the wall and The Night's King converts him and Jon somehow becomes the Nights king?? also there is a theory that the wall was built around a dragon(s)....when the the walkers try to come south of the wall they will have to break the wall and when they do that the dragon can come out and either jon converts him or he might already be converted and Jon rides it to fight Danny??? Targaryen vs Targaryen.....and maybe they can get married to make truce.....Targaryens have never shied away from some incest
what if the crows throw Jon over the wall and The Night's King converts him and Jon somehow becomes the Nights king?? also there is a theory that the wall was built around a dragon(s)....when the the walkers try to come south of the wall they will have to break the wall and when they do that the dragon can come out and either jon converts him or he might already be converted and Jon rides it to fight Danny??? Targaryen vs Targaryen.....and maybe they can get married to make truce.....Targaryens have never shied away from some incest