Un YouTuber llamado Sanadsk menciona que tras analizar varios ficheros del juego, aparece el código "DLC2_MIYAKONOMOUJA", cuya traducción sería algo similar a City of the Dead.
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.
De confirmarse parece que la franquicia de Miyazaki se cerrará con una visita a Londor.
No deja de ser un rumor así que como siempre, cogedlo con pinzas...