I can see Wayforward coming along in the future for other Bloodstained games or spinoffs. They already have a Metroidvania background prior to assisting with Ritual of the Night in the Shantae games, and the obviously Castlevania-influenced The Mummy Demastered.
Castlevania's current home seems to be trying to get it to work for mobile platforms, so I don't believe Konami would even consider Wayforward, despite the...well, absolutely blatant effort they did with Classic Mode here.