Koji Igarashi's expressed interest in making a new classic-style Castlevania
Titled Castlevania the Adventure ReBirth, this will be a return to the series' roots, meaning rather than featuring the Metroid-esque gameplay of more recent titles, the game will once again be divided into separate platforming action stages.
I think it's safe to assume that this is going to be more in the style of the NES versions than the newer GBA/DS ones.
quotes from: http://wiiware.nintendolife.com/news/2009/09/castlevania_comes_to_wiiware