I think it’s a similar ending he has in mind, but a better route.

I presume that the Targaryn who has taken Storm’s End topples Cersei (who has to get killed by Jamie) and takes King’s Landing, and having Dany go off at the new King who is less a villain helps sell the fall into madness which ends with Jon being a Queen Slayer.

Don’t know how Bran gets there though, him waring someone and that person getting the throne could make sense.

I’m most miffed about not getting to see what happens with Stoneheart as well as Euron and other at sea Greyjoys.