According to the latest issue of Famitsu, Steins;Gate 0 will launch on November 19 in Japan. The sequel to Steins;Gate is coming to PS Vita and also to PS3 and PS4. The PS Vita version will cost 6.800 YEN.
There are no news yet on a western release but it is very likely as the teaser trailer has english subtitles.
Watch the Steins;Gate 0 teaser trailer: