Who will become King or Queen? [Spoilers EXTENDED]

1.Bran:I’m sure he will become King, but I’ve seen people think that he will only get the North, the Vale, and the Riverlands.
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Question:Will he become King of the Seven Kingdoms, or only rule the North, the Vale, and the Riverlands?
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2.Jon:I’ve seen theories that he will become King.
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Question:Will he become King of the Seven Kingdoms, or only King in the North like in GoT?
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3.Arya:I’ve seen people believe that Robb will name her as his heir, which I also believe, but I have a slight doubt in my mind about whether Robb would really name Arya, who no one knows where she is + who might already be dead, as his heir instead of Jon.
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Question:Will she really become Queen in the North and Queen of the Trident rather than Jon? And will she actually officially become Queen?