What I'm hoping for, honestly, is that in the end we're just left with
Stannis leading a somewhat-united Westeros army against the White Walkers, Dany coming in when all hope is lost and likely after Stannis is killed and wiping the floor with everything with her one or two surviving Dragons. She will then inherit the throne.
I predict most of the Black Watch will be decimated trying to prevent the Walkers from passing The Wall, which will naturally be destroyed in a massive setpiece towards the end of TWOW, and what remains of the Watch will end up with Stannis.
The Lannisters will be reduced to pretty much Jaime as a survivor. Sansa will be the sole surviving Stark since both Bran and Arya will likely be something else altogether. Rickon will be killed in some horrible way because he's a child and this is GRRM. The Blackfish will show up at some point to save the day only to die as well. Stoneheart will be destroyed by Brienne who will likely be killed in a tragic twist of fate by Jaime.
Just imagine the worst case scenario for nearly everyone and that'll be the endgame.
I predict most of the Black Watch will be decimated trying to prevent the Walkers from passing The Wall, which will naturally be destroyed in a massive setpiece towards the end of TWOW, and what remains of the Watch will end up with Stannis.
The Lannisters will be reduced to pretty much Jaime as a survivor. Sansa will be the sole surviving Stark since both Bran and Arya will likely be something else altogether. Rickon will be killed in some horrible way because he's a child and this is GRRM. The Blackfish will show up at some point to save the day only to die as well. Stoneheart will be destroyed by Brienne who will likely be killed in a tragic twist of fate by Jaime.
Just imagine the worst case scenario for nearly everyone and that'll be the endgame.