For adults, specifically though. As in, The Pro-style adult, or HBO's Spawn, or Aeon Flux. I liked Superman: Doomsday and Justice League: New Frontier a lot (and two of the first four DTVs that Marvel put out), but they aren't adult just because they have a bit more blood and more amped up violence than the Batman and Superman TV shows. The dialogue could be more grown up sometimes too in these projects, though Doomsday and New Frontier did fine in that regard.
I understand they're trying to appeal to a diversity of ages (you can still show your 9 year old Doomsday, it's just that it was made PG-13 style to appeal to teens and adults too), but throw the adults-only crowd a bone once in a while.