I assume Konami's thought proces regarding Castlevania these past couple of years was this:
"We took a risk with Lords of Shadow but it didn't bring in the big bucks like we hoped. Harmony of Despair did well, despite being made on a shoestring budget. Let's try to recapture that succes except let's do it on mobile since we restructured our entire company to focus on that. "
Anyway, the game itself looks nothing special but I admit I'm looking forward to what kind of fan service is going to show up. They seem to do a pretty good job in that department, so I hope it's enjoyable on that level.