Actually, it really is the Temple of the Dragon, see the bits that are hanging off from the Temple? The stage from 5 has those and they look the same goddamn way, well, shit, things are getting real juicy all of a sudden.
Actually, Harada seemed to be chumming it up with TN more than anyone else, and he's been talking about collaborating working with other FG devs a lot, and even Shimbori was talking about more opportunities to work with others. It might not be so crazy after all... wow. But then again, it's not like such images are exclusive to DoA... pagoda shrines all tend to look like that.