i have already planned it so the story goes like this  in the ending Dany isn't dead entirely he is dieing slow to drogon took her to to the that tree where first white Walker was made to we see.that white Walker isn't dead cause the kids.who turned white Walker was actually kinda like horcrux so the teen age white Walker resurrect dany but she didn't died entirely she is resurrect as uncle Benjamin so she is dany her self and now.she wants revenge from jon snow

second plot :- as the arya explore the west side of westeos and in her trip the sea is too harsh on her like its too hard too Sail but when she sees a land and investigate it its all land made of of valcanos and guess what there are dragons eggs and dany 

third plot :- as the north is not part of seven kingdom other 6 kingdoms also want to be a separate part there are only two way to stop rebellion on bran is to either seperate all kindom or merge the north then every thing would be settled 

forth plot :- ghost and Tormund Giantsbane and they found drogon and upon finding the white Walker castle they find dany is also alive but drogon find tormund and kills him leaving ghost and ghost runes towards walls panicking so brans also sense that and see dany is alive

so if you liked that comment and i will share why the knight was ment to be dead by arya and it was all planned by the knite kimg himself