According to Square, Final Fantasy VII Remake will be "told across a multi-part series, with each entry providing its own unique experience."
No additional details were provided, including any kind of price or release timing for part one.
Source: http://ie.ign.com/articles/2015/12/07/psx-2015-final-fantasy-7-remake-will-be-a-multi-part-series
During this past weekend’s PlayStation Experience in San Francisco, SQUARE ENIX® debuted a new trailer for FINAL FANTASY® VII REMAKE, the full remake of the award-winning role-playing game, FINAL FANTASY VII. The new trailer features the first CG scenes as well as gameplay footage. FINAL FANTASY VII REMAKE will be told across a multi-part series, with each entry providing its own unique experience.