I've honestly got no idea how things will play out at this point.
Dany has absolutely zero friends left in Westeros besides Grey Worm and Drogon because she went full Mad Queen. Hard to keep loyal subjects when you torch everything. Perhaps she is just happy knowing she absolutely torched the 7 kingdoms and decides to run back to Mereen to be with the only person left who loves her (Daario). Leave the ash pile behind her and let the (very) few houses argue over the scraps. I honestly see her going back to Dragonstone at a minimum.
Jon Snow has always been loyal to a fault (like Ned Stark), and I do not see him breaking rank to kill Dany. He may no longer recognize her as the queen, but he won't do anything drastic.
Arya is a coin flip. She either says FTS and rides into the sunset or she goes after Dany.
Some characters with unknown endings:
Jaqen H'ghar - does he come in to shut down Arya, help her, or even show up again at all?
Edmure Tully - Was last seen being used to reclaim Riverrun for the Lannisters and supposedly being shipped back to prison in the Twins
Ellaria Sand - Last seen in the dungeons of the Red Keep. Cersi poisoned her daughter, but what happened to her? Assumed killed in the cells?
Yara Greyjoy - Last seen sailing back to the Iron Islands. Does she really have anything left to do?
Brienne & Podrick - Do they stay in Winterfell as Sansa's guard? probably
Gendry - Does he go to Storm's End and be content? Does he find Arya and convince the post-nuclear version of her to settle down?
Bronn - Only one Lannister left to pay him, don't really see him with any choice but to either ride into the sunset or rage kill Tyrion.
Sam & Guilly - Staying in Winterfell/north? Don't really see anything for for them.
Tormund - Same as Sam. Ride off to the north and never be seen again. Brings Ghost with him.
Daario Nahharis was last left in charge in Mereen. Does he come back at all?
Davos Seaworth - Follow Jon (probably) or stay with Dany? Or simply disappear back to Essos/Braavos to live out his retirement years...
Robin Arryn - Left behind in the Eyrie. Do we really care?
And we have no idea what the Iron Bank will do now that the Lannister loan to buy the Golden Company won't get paid...