While I agree with Flag about combining some character classes is just a rules rape, I have long thought that the underworld would draw not just disinfranchised Solars, but Dragon-Blooded and Lunars. In my game, I have Outcaste DBs serving various DLs, but the point-blank comment in the book about the Neverborn being able to make a DL out of a Lunar's ghost seemed to be on point of a Abyssal-aspect Lunar. Possibly a Lunar running into a old Solar mate that has gone to the Dark Side, and feels compelled to follow. With the shifting powers of a Lunar, I can see a DL drooling over the chance to experiment on one to shift it to the necrotic power of the underworld. I grant that it would not be common, and any such creature would be on the Silver Pact's list of Public Enemy number One. But, I still see it as a possibility.