Final Fantasy 7 remake! :D Never say never!
More seriously, it should be Days Gone if the game is almost ready and release early 2019. It could be Spiderman if they feel like it needs a boost of recognition (not sure about that...) or if they prefer to advertise the console over a game (Spiderman would sell PS4s, Days Gone would help to sell the game).
TLOU2 is way too early IMO, surely next year.