If you have not yet checked the Battlefield 1 maps list out yet then have a look now. The Battlefield 1 Maps listed in this thread are the maps that will be shipped out with the game on release day (Vanilla maps).
DICE have now confirmed the Battlefield 1 Maps listed below will be in Battlefield 1 on launch day, 21st October 2016.
Giant’s Shadow (coming free in December)
The St. Quentin Scar