I'm sad to see IGA go. As much as I love Castlevania as a whole, he is responsible for my favorite games in the series. I understand that he couldn't make Castlevania games forever, but I do wish he could've done his final 1999 game first. I kinda feel like we didn't get a complete ending to his saga, which is too bad.
I don't know what's next, and I don't expect to see it for a while, but I hope it's good.