When I say "conflict," I tend to mean it in the literary sense of conflict, which is just when two people/objects/themes clash for one reason or another. I wasn't intending it to mean a physical or face-to-face one between them. "Confront" was just to say I expected Zero to make himself known somehow. I know that Zero has a strict code about actually "confronting" people in a phsyical sense, so I wasn't really expecting that at all, given Johnny's the laissez-faire flirtatious type (at least on the outside) and doesn't even drink blood from live people. Sentience's manner of providing blood in transfusion packs is what he's used to.
Cherry which we may get one, which will be awesome and unbelievable is a cyborg vampire who is also a vampire hunter. He and Zero probably have a few things in common, Cherry hates vampires with a passion.
Are there any specific things you want to know about Johnny and his canon? The wiki doesn't have much information at all in my opinion.