As others have mentioned I think it's safe to say Shireen and her king's blood will end up leaving with Sam, and Gilly. The scene with her teaching Gilly to read made it on screen for a reason. Who knows if Maester Aemon will die before the trip, or not. And I agree the show is better when you just accept that it is a different story, and will never live up to the books. I think the pinnacle of the show will be Dany taking off on Drogon, or the first time all 3 dragon riders saddle up for battle.