Nah completely different devs did all of those games. Look it up.The remaster counts. It isn't a full new game bu required substantial work. In fact, I didn't mention as secondary, external projects Sony Santa Monica also published/mentored several 'indie' games like Journey, Hohokum, Sound Shapes, Everybody's Gone to the Rapture, Unfinished Swan, Fat Princess and Here They Lie and supported the two GoW PSP games and the GoW collections.
Btw, GoW Ragnarok is 2021.
And we'll see about the next God of War game. It still doesn't have an official name, btw.