YES, I would be VERY interested in something like this, but only if it worked in such a way that allowed for 2D tile building, and other such features relating to the ability to create your own version of Castlevania utilizing all the tools and effects contained within the series' 2D releases thus far.
Plus, it would have to have an intuitive enough UI, that all mentioned above would be possible without the need for programming on my part.
Also, tile, character and enemy creation/customization is a must.
Get to work on it Konami!!!