Arrgh ! First post I ever wrote in English, and I lost it because it was so long for me to write it that I was logged out when I tried to publish it…
Anyway, I’ll try to re-write it (and please be lenient with my English, that’s not my native language…)
First of all, I’m glad I found this forum !! I just finished reading ADWD, couldn’t stand the idea of Jon being dead. One Google request later, here I am reading this tread through from pages 8 to 48… All these (crackpot or not) theories are brilliant !
As for me, I particularly like Needle’s theory, and I’d love for it to be the truth, but as I re-read this chapter, I found something which imo doesn’t totally fit with the idea of Jon warging in a ice cell corpse : first, it’s written :
“The corpses. Jon has almost forgotten them.”
If so, how could Jon have been secretly practicing at warging in one ? OK, Needle’s theory doesn’t need for Jon to have warged in one of them before that day. But later, after the speech in the shieldhall, we find :
“ ‘Is it wights ?’ asked Rory. Jon wondered. Could his corpses have escaped their chains ?”
But in Needle’s theory, at that time Jon is supposed to be warging one of these, isn’t he ? If so, how could he wonder if they have escaped ? But again, I love this theory, and I’ll be glad to be proved wrong !
Another thing : imo Jon’s decision to go south to Winterfell isn’t so out of character ; Jon has been struggling for a while with the ‘the NW doesn’t take side in the wars of the Kingdom’ rule, especially as it involve the Boltons. He couldn’t help himself giving Stannis the idea of finding men amongst the northmen’s clans. He didn’t go searching for Arya, but agreed to release Mance to do it. And the letter was the final blow :
“ I want my bride back… I want my bride back… I want my bride back”
It doesn’t surprise me to see Jon, probably feeling guilty to have left who he thinks is Arya in Ramsay’s hands, and seeing a chance to rescue her (Ramsay doesn’t have her anymore), deciding to go to Winterfell.