A few hours ago, a German retailer leaked a bit more Battlefield 5 info than they probably should have. Release dates, and an unexpected time period set during World War 1.
The retailer has since edited their listing of Battlefield 5 to not include the WW1 description, however the damage has already been done, and the listing was screenshot before EA could make the store remove the leaked data.
Sources:
Original listing (containing leaked description): http://www.neogaf.com/forum/showthread.php?t=1190630
Current listing (Leaked description has been removed):
http://www.neogaf.com/forum/showthread.php?t=1190630