As we speak, Bandai Namco and From Software have just officially announced Dark Souls III. Right now, all that was shown, was a single trailer. Trailer itself was a CG cinematic and had no actual gameplay within it. However, from what we have seen so far, the game is set to return to the fantasy, medieval thematic of Dark Souls I & II. On a side note, there was no mention of Hidetaka Miyazaki, so possibly the game is being developed by From Software’s second team.
No official presentation has been held as of yet, but more information on the game is to come soon, so make sure to come back later, for more on Dark Souls III.