I didn't like the line about including heavy metal music "like the early games".
What early games before SotN had heavy metal?
Can't count RoB since it didn't come out in the west until years later even counting early emulation.
I don't like that kind of talk because it almost always means that the people behind have more of "hey I remember Castlevania being pretty cool, let's make a rad thing based on my memories of" sort of attitude as opposed to thinking more like "I love Castlevania, so let's make a cool thing based on it that all the fans will love as much as the games".
So far it sounds more like Vampire Hunter D with a fresh coat of Castlevania mythos.
I'm guessing when he mentions "metal" he's one of those people that envisioned the early CV's bit-tunes music to be represented as "rock" or "metal" sounding songs if played with real instruments. A part of me can relate to that. A lot of them do sound great played in the metal style(they do have the rock-arranged CD, and it sounds fantastic), but a lot of the songs also sound great done in a more progressive rock and baroque style, as well.
Though, I kinda think he means less modern metal and more stuff like Ozzy's "Mr. Crowley":
https://www.youtube.com/watch?v=vDVLMS_Yhe4Oddly enough, from an old interview I remember seeing back in the day, I think David Jaffe originally wanted God of War to feature a pure 80s-styled metal soundtrack. I think he originally envisioned that game(Kratos battling violently against monsters and gods, having sex with hot maidens) as some sort of old school ode to metal and classic heavy metal album covers(and it makes sense). Eventually he went with the orchestral score instead, but a part of me would love that "old school" take, maybe with a new game series(we need some badass knight fighting monsters, witches, demons in medieval/Conan-esque setting with a mixture of both 70s-mid-80s heavy metal and some Progressive rock as the music). Oddly enough, I edited the first LoS2 trailer with Ozzy's "Bark at the Moon" and it came out pretty cool.