I have trouble remembering, when Didio put up the Giant Wall of No Vertigo crossovers, did Phantom end up in DC or Vertigo? Because I love him in both- annoying the frick out of Constantine, or being enigmatic to Zatanna... yeah, he needs a new mini STAT.
If he did end up in Vertigo, I have to say it would be really weird to have Dr. Thirteen in a separate universe, since they originally shared a comic book together.