*** Jon Snow Predictions:
Since Azor Ahai's identity is still unclear, but is probably Jon.. It is safe to say he will play a huge role in winning the war against the Night King.. he will be praised as a hero and an iconic figure, and probably abandon the whole concept of Kings and Rulers.. He will probably form his own version of the Night's Watch (Reviving the concept of The Night's King).. their duty is protecting the realm, and Sansa if she rules in the end.. He might remain the ruler of the North.. but I personally assume that most of the North will be destroyed by the end of the series..
***Bran Stark Predictions:
I won't comment on his role as the 3-eyed Raven because it's unpredictable.. But I assume Bran will Revive the concept of "Bran the Builder" and rebuild Winterfell from the Ashes, after it gets destroyed by the Night King..
** About Sansa & Tyrion:
I gave the wrong impression by saying she "herself" will order his assassination.. what I meant was she will have knowledge of it or might mention it at some stage to Little Finger.. to give him the false belief that Sansa might call for him as a king.. I was pointing more towards little finger.. But Sansa will not necessarily be linked to Tyrions Death.. sorry for the confusion..
BUT... there is the possibility that Tyrion might hand the Iron Throne to his wife Sansa and head off to Meereen where he would rule Essos, establish relationships with the Bank of Braavos and unite the world under their united banner...
This scenario would be more feasible than the Tyrion getting assassinated scenario..
These are my predictions on how the show might end.
Not based on anything, just a hunch after interpreting the story and its character developments.
Music: Game of Thrones Theme - Karliene Version
https://www.youtube.com/watch?v=QahVz0ZcifQ
You might want to check out GoT Academy's video for more details:
https://www.youtube.com/watch?v=Cesr8GAIjv4