Will the upcoming be released in multiple parts? Sure seems like it.
Says a press release that was sent out tonight (bolded emphasis mine):
LOS ANGELES (Dec. 6, 2015) – 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.
We’ve got a query out to Square Enix for clarification on this, since it’s a bit vague, but that doesn’t leave much room for interpretation.