I predict good news tomorrow. It's very un-apple-like to come out and parade themselves around when they don't have good news.
Bad news comes in the form of press releases. Good news comes in the form of executives strutting around on stage.
Of course, it's not a hard rule. I could be wrong. But based on history I'm voting for 'good news' for tomorrow.
You also don't release good news on a Friday. It's called Friday News Dump for a reason.