Battlefield 1 is the name of the new shooter in the series from DICE.
Battlefield 1 set for October release - retail leak
This is according to a retail leak posted on Reddit.
The title makes some sense, considering there has never been a Battlefield 1.
The game is set for release on October 18 for those who pre-order the Early Enlisters Deluxe Edition. It includes the Hellfighter Pack which contains themed items inspired by the 369th Harlem Hellfighter Infantry Regiment.