There's no real urgency to running the news-ish information revealed by Alan Horn during his appearance at the Bloomberg and Tribeca Film Festival Business Of Entertainment Breakfast (or the BTFFBOEB, as the kids call it), because it's basically all information that's already been released or that can be inferred.
He confirmed that the recent shoot in Abu Dhabi was a second-unit for "Star Wars: Episode VII," which JJ Abrams is directing. Horn said that casting is almost complete, but it's obvious that he's learning that anything he says about "Star Wars" at all is going to become headline news around the world. Even if he says nothing, that becomes a story. "If I say 'there are no skateboards in Star Wars,' that gets headlines."
Whenever they do decide to make their full casting announcement, it's going to be a nuclear-scale event on film blogs everywhere. I'm curious to see if they go into any character detail at all at that point. Whatever they announce will be parsed completely, picked apart and micro-analyzed for hints about where they're heading.