I whole heartedly endorse a reboot. While that means that the plot moving forward will be missing great games/characters/stories such as the series original Simon, Trevor, Alucard, etc, newer games arguably killed the magic that made Castlevania. I forget which one it was for the ps2, but you play a guy, that A) doesn't use a whip, B) doesn't fight a vampire/Dracula, and C) is not a Belmont. It was NOT a castlevania game, and yet, it was supposed to be. (I cannot comment on the hand-held versions, since I haven't played a single one.)
The series truly needs a reboot. I'm hoping elements from the original series make their way into a rebooted series, while someone competent handles the gameplay. Kojimas assistance is promising. Since he's not director, I'm sure there's an editor involved somewhere to keep him in check.
I wonder what elements of the original string of Castlevania games make it in there. Will Gabriel name his child Simon? Will (assuming there is a) Dracula be raising a child Alucard? Curiousr!