Thanks Bomberjay. Liked those theories. Some silly but you never know. That last one does seem logical. Liked the last sentence "You now know the ending at least a decade for anyone else will."
I think there's a whole lot more to the series than just who should sit on the Iron Throne. I think that's kind of the point too. Don't get caught up in this battle for the throne when you have white walkers and winter goming to get you, there's more to life.
I'm sure the basic theory will prove to be correct, but I don't think it's 'the ending', not even close.
What I will be most amazed with is how all of the other issues are resolved - if they are to be resolved.