How will a Song of Ice and Fire end?(Theories)

[Tyrion King on the Iron Throne]

Daenerys will help defeat the Others with her dragons after which she return to Essos when she realizes that it is her true home.

i hadn't thought of that. she is always chasing after that house with the red door. isnt it supposed to be in braavos? unless the red keep has a red door, and she's just getting crazy visions.