DE seems to be doing what they can right by just releasing mini-series. Marketing indicates that people buy #1s more (since it is "new"). On-going series rarely continue for any company other than DC and Marvel.
Perhaps instead on an on-going DHP style title, lets have a series of one-shots under a certain heading like Masks or Noir? I could see one-shots coming from DE emphasizing their Pulp Universe with one-shots called Masks: The Spider versus Green Hornet, Noir: Miss Fury's Rage, etc. Either a series of one-shots or a series of mini-series (without break--follow one Masks mini-series with another).