A Shadow of the Colossus remake was announced at Sony’s E3 press conference. Shadow of the Colossus will launch for PS4 in 2018.
Very little information is known about the title at this time. Japan Studios and Blue Point Games are the developers responsible for the game. No other information has been given at this point.
From the trailer it would seem this is a remake rather than a remaster like the PS3 version. At this point it is merely speculation, but you can watch the trailer for yourself and decide.