It's exactly as I suspected honestly... I knew Castlevania didn't have many fan games, much less finished/good ones, but I was hoping that making a directory for the fan games and game making tools would help encourage more castlevania games to be made.
I wonder what it is that's holding people back from making a castlevania fan game/hack?
Methinks one of the reasons is because none of the later, more flexible castlevanias have been extensively hacked besides Symphony of the Night, so people have to deal with the archaic NES castlevanias.
As for fan games, I think the biggest issue is that to make a fan game, people need custom graphics, which requires talented artists. Additionally, they need a programmer, a story writer, composer, and other people. To get these all together requires organization and combined commitment.
Making a castlevania fan game/hack seems a lot harder to do than making a good Fire Emblem fan game/hack, which has become very easy and user friendly.