As was said in another thread here, artwork can only mean so much. LoS had some gorgeous production artwork, but the "game" left a lot to be desired. These are some tantalizing visuals, though the second doesn't look much different than some of LoS latter stages. I'm not totally getting the CVIII/CVIV cover artwork feel yet; there's a bit of a moodier Assassin's Creed feel here somehow. In short, I need to see gameplay, and a good deal of it. I was fooled by the first stage of LoS, with the rain and the village. Little did I realize that "one screen" was the entire stage, and I would not be exploring the village as it was under siege. I want to be excited, but I can't yet.
As for this notion of everything needing to be "in the castle," I find that a lessening of Castlevania's potential. LoS went too far, as its "world" didn't compliment the castle in atmosphere or design; however, CV II, III, IV all showed how great it is to explore beyond the castle. It generates a terrific build-up to the battle with Drac.