Title's a little misleading, since Dante's Inferno (and the broader Divine Comedy) have all sorts of historical, philosophical, political and divine associations with them. If you're implementing the Nine Circles of Hell idea, I'm fairly sure that's been around since well before Dante. I get the impression that the general roleplayer may be more familiar with the idea of the nine circles of hell than they will be with Dante's Inferno, so I might suggest a re-titling, even if it's just to something like "KH in/and/with the nine circles of hell."
I think you can do interesting things with the concept as a thing to do with realms or planes, but I've no idea how it could be well-integrated into the current KH cosmology, so it just sounds like it'd be a fairly normal (though perhaps 'evil') place, or just nine dudes based on the corresponding circles.