SideQuest Studios has just announced that both Rainbow Skies, and a port of 2012's Rainbow Moon will be coming to PS4 in 2016. The former is still in development, and to add some consistency, will be released alongside of its predecessor. They will apparently support Cross-Save capabilities.
Advancements for Skies include a better dialogue system, more complex narratives, and the ability to skip any conversation (while the game keeps a log of everything for you). I wasn't super crazy about Moon but I'll give this followup a shot.