One thing I noticed while playing the beta is the first miniboss. While yes it is very different from the Hellhound in the final, what amazes me is that this would have been the very first appearance of the Behemoth.
Rondo predates Bloodlines, tho. And I think that is
not intended to be a Behemoth. If you wait long enough, you'll see it howling just like the final Hellhound miniboss does (more of a "dog" thing than a "bull" thing).
Then again, "horns" are not a dog thing, so who knows. We can't tell what the hell that thing is supposed to be with certainty.