Some quotes:
"Reaching out for the masses can be seen in a few decisions. The stages are linear pipes, so you won't see too much of Castlevania-ish back-and-forth treks. At the end of a sequence upgrades and weapons in a given stage are revealed, so dedicated adventurers can return to acquire everything. This design choice is a cute attempt at playing to both the nerds and the masses."
"Castlevania is being made by the Spanish Mercury Steam, which in their games Clive Barker's Jericho (60/100) and American McGee's Scrapland (66/100) borrowed influences from many top-quality games without succeeding at making other people's ideas their own. Now in addition to God of War, Shadow of the Colossus and Prince of Persia are being borrowed from quite shamelessly."
Apperently they like the boss battles.