This reveal goes along with Nihon Falcom’s plan to bring the whole Trails of Cold Steel series to PlayStation 4 within their current fiscal year that will end in September 2018. The first and second titles, which were originally released for PlayStation 3 and Vita, are getting new PS4 versions as Trails of Cold Steel I -Thors Military Academy 1204- and Trails of Cold Steel II -The Erebonian Civil War- which will be released in Japan on March 8 and April 26 respectively. Trails of Cold Steel III has been released in Japan on September 28, 2017, and thus the upcoming Trails of Cold Steel IV should be slated to be released by September 2018.
However, as of this writing, none of the PS4 Cold Steel titles are available in the West yet. Currently, there are localized versions of Trails of Cold Steel I and II available on PS3 and Vita. The first game is also available on Steam.
[Source: Nihon Falcom]