It was reported yesterday by MTV that Burton is still editing and working on some visual effects for the film, but with only four months to the release date you'd think the studio would want to start hyping it up!
From the photos, it looks like Johnny Depp's Barnabas Collins make-up takes about 15 years off his face. The same can't be said for Michelle Pfieffer as Elizabeth but I think I'm most excited to see her performance. It's been 20 years since she and Burton collaborated on Batman Returns and I loved her performance in that film! Hopefully they'll be able to create some new magic.
2012 is going to be a busy year for Tim Burton. He's also producing and directing the new Frankenweenie and producing Abraham Lincoln: Vampire Hunter for Timur Bekmambetov. Incidentally, it's also a big year for Seth Grahame-Smith who is writing both Dark Shadows and Abraham Lincoln: Vampire Hunter (from his novel).
Perhaps Burton is simply too busy to worry about promotion at the moment.