Yeah Dark Horse has been rumoured to have been making some kind of huge announcement for the last week or two and nothing's come down yet. I doubt it has anything to do with Clone Wars, if anything it most likely has to do with their rights situation regarding their Star Wars line. As mentioned above it is supposed to expire...unless they've worked out some kind of deal with Disney/Marvel to co-publish, which would be huge news, but outside of this I haven't been able to come up with what it could be.
Well whatever this announcement is, Randy Stradley was very excited to make it. He teased that there was an announcement and then has had to keep pushing it back. If it was something bad he wouldn't have been antsy to share it with fans.