There's a Vampire Villain and We Don't Even Get a Single "Bat" Pun?

Looking back through many of the posts people contributed to our week covering the original Batman comics, I’m finding that there’s a lot of confusion over some of the situations Bats gets himself into and the actions he makes in kind. Driving a sporty red convertible in the batsuit? What? Seeking advice from LSD flower heads? Seriously? My question is: did anyone see that issue where he fights vampires? What the hell even is that?? There’s NO DISCERNABLE EXPLENATION for why Bruce Wayne and his fiancé Julie end up deep in the “Carlathan” Mountains of Hungary (other than, pretty much, “that’s where the Monk lives”), or why he’s fighting straight-up, no-bullshit vampires. Like, not escaped convicts-turned-bloodthirsty nocturnal mutants a la runaway chemical spill, or Satanists with crazed ritualistic inclinations, but actual vampires. Complete with fangs and telepathic/hypnotic/transfigurative powers. This, beyond everything else in these first issues, is what truly astounds me. I mean, the dude’s basically Van Helsing in this one. Batman the International Vampire Hunter: Battler of the Supernatural, Champion of the House of the Lord. Someone wrote about religious symbolism in Miller’s DKR and I think if there’s anything from the originals that you could use to show where he may have drawn his inspiration from, it’s got to be this. Right? I don’t know, it’s just seems so far outside of where I’d ever picture Batman to be in his fight against crime. This tale just strikes me as less of a fight between the just and the unjust and more a battle between the forces of good and evil on a Biblical scale.