From Stephen Reid, Senior Community Manager of SWTOR:
"Tomorrow's update will be interesting. Sadly I'll be flying so doubt I'll see your reaction until later... ah well. Hope you like."
https://twitter.com/#!/Rockjaw
Edit: Thread on SWTOR forums about the tweet.
http://www.swtor.com/community/showthread.php?t=627551
NDA DROPPED COMPLETELY. 11/18
is this the big announcement? looks like it