Could this lead to the fall of Cersei? Jon and Dany formally join forces as Dany has now seen the threat with her own eyes. They start to rally everyone they have and I mean everyone. They also approach Cersei to get her to join their alliance. They show the proof and plead their case and are clearly in the right. But she refuses and Jaime sees all of this and realizes she is the "mad king" all over. So he kills her and starts to send everything he has north. Dany, Jon and Jaime as the three leaders of the combined armies. They win it all and Dany assumes the throne with Tyrion as her Hand. Jon the Warden in the North and Jaime the Warden in the South. Then we briefly see characters like Gendry, Tormund, Sam and Bron rise up to be new major houses.
I'd be quite happy with that ending.
