I wouldn't expect something outta IGA's new company for at least a year or two. As for Konami with Castlevania, now that MercurySteam is no longer at the helm, if there's nothing at TGS this year, then my guess would be to wait until next year's TGS. If there's nothing at that one, then I think at that point we can assume the series is on hold.
Funnily enough, Resident Evil is in the same predicament right now. Released a few games with that received some overall disdain, and now the future of that is uncertain, too.
And I've been itching for new games of both that and CV.