It seems to me that the series might be served better if someone other than MPI were in charge of marketing. They were guaranteed a certain amount of sales from the start and have managed to persuade the fanbase to purchase the same material numerous times. (VHS, pre Barnabas episodes, DVD, coffin set, etc.) They've promised new material that has yet to materialize more than once, so even hardcore fans may be reluctant to shell out once again.
Aside from the documentary, the interview that KLS, Lara and David Selby did with Herbie Pilato last year for Decades (I think) has yet to show up anywhere. I haven't seen it mentioned anywhere in quite awhile.