Se ha filtrado código oculto en los ficheros del juego, DLC2_MIYAKONOMOUJA, que traducido seria City of the Dead. Lo que podria situar la ultima entrega en Londor. pero como siempre cogerlo con pinzas hasta que se pronuncien.
The Japanese name of the DLC will be Miyako no Moujia, which translates to The City of the Dead, a name which seems to hint at Londor, land of the Hollows, as the setting. Sanandsk also noted how there are a few weapons not obtainable through regular means that have a sort of Hollow look, meaning that they may actually be weapons found in the new DLC area.
Apparently the next DLC is called something like "City of the Dead" but also uses the same words for Profaned Capital and Hollows. So it's very possible for it to be named "Capital of Hollows" which might also be Londor.
There was code found in the game files called DLC2_MIYAKONOMOUJA.
Miyako no mouja (都の亡者) literally means "Capital of the dead", but they refer to Hollows as "the dead" (亡者) in the JP version, so the localized name would be Capital of Hollows.
Since Londor is decribed as the "land of hollows" in the Hollow's Ashes description (or more specifically, "country of Hollows" (亡者の国) in the JP version), it's likely that the DLC will take place in the capital of Londor.