Anybody else think Jon snow is rhaegar and lyannas child? Why was lyanna dying? Possibly from giving birth. Also since it was eddard that left Robert in anger over the murder of the Targaryean children to finish off the last of the loyalists and get lyanna, finding her giving birth or heavily pregnant or dying from giving birth would totally sway Ned into claiming him as his own so Robert doesn't kill him. I think that's why Ned was so hesitant to tell him and only tells him he is a true stark when they part ways.
There's a bunch of other things too, a vision in the books dany has of rhaegar holding a baby he says "this is the prince that was promised, his is the song of ice and fire", ice being the wall and the north and fire being how to kill white walkers and wights.
There is a good chance that lyanna actually wasn't kidnapped like Robert says but just eloped with him because Robert has always been sleeping around the way he does and rhaegar seems like a much better option.
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