TRANSFORMERS, CASTLES IN DISGUISE
Well given the gameplay bit, that does seem to be a Castlevania Golem, animated by what seems to be Castlevania's very blood. (I love that idea of the castle having blood)
Turns out Gabriel Belmont thought he was a Dracula when the whole time he was plugged into the MATRIX! WOAH.
In the end, we will see it was all a bad trip, and we'll see Gabe in modern times, a normal guy, passed out next to some Castlevania games. "whoa, what a dream. I knew I shouldn't have played them all one after the other..."