That's Konami's own fault. Outside of Metal Gear and Pro Soccer, they haven't truly tried to grow some of their key franchises. And them attempting to revamp Castlevania now is too little too late in my opinion.
If they actually cared a bit more about their other franchises like Contra or Z.O.E they'd have a better outlook. But instead, they want to be a Kojima fest. Even Mercury steam's Castlevania game has Kojima's stamp on it.