Well, the game very much looks set to be the origin story of the Aglaophotis substance which played a massive role in saving Harry and Heather Mason's lives in Silent Hill 1 & 3. The tagline "Find the Beauty Within Terror" and the flower themed Otherworld scream it.
I'm also definitely going to play this game entirely in Japanese, mainly to further immerse myself in this new, Asian setting after seven mainline games and two side entries set in America. I usually have no problem with English voice acting, but this time I'm most definitely going to go full Metro and play in the foreign language for immersion's sake. Remember, the Silent Hill games are famed for being some of the most immersive horror titles of all time, so why not go whole hog?