Personally I wouldn't get overly excited about the 7th, there's only a few things it might really be.

1.) When sign-ups for Beta Testing begins.
2.) A new trailer.
3.) A new Producer letter, perhaps a Live one?
4.) More information about the current status of ARR, possibly a few new tidbits of information.
5.) All of the above/any combination of the above.

I'm betting it'll probably be when Beta sign-ups begin, and maybe some new info if not a second teaser trailer regarding ARR. Didn't they mention something about there being a three-part trailer series to shed some insight on what happened? I might just be imagining it but overall I'm not really seeing it being something to piss your pants about or sit around pondering for too long. We'll know in about five days anyhow so sit back and just relax.