Good theories you don't see coming true[SPOILERS MAIN]

Any theories which aren't very far fetched and are believable enough but you don't see them coming true for whatever reason? Or the ones you think GRRM once considered but possibly abandoned due to his gardener approach...

For me, it would be Tyrion Targaryen, I think in AGOT, there's definitely some foreshadowing for Tyrion Targaryen but I think George abandoned that idea afterwards