SilverWook said:
J.J. and Kathleen Kennedy are going to be guests at Star Wars Celebration in April.
http://www.starwarscelebration.com/Guests/Special-Guests/
I think the chances of something major being unveiled has just gone way up.
Oh I'm anxious and hoping there will be a tease for TFA too.
The following article predicts something also, like a short footage or more likely a new trailer; it claims: "This will be a day long remembered - trust us".
http://www.polygon.com/2015/2/13/8035911/star-wars-the-force-awakens-jj-abrams-star-wars-celebration
I wasn't planning on it, but maybe I'll seriously consider buying a ticket and flying down there. Never been and I'm sure it will be a whole lot of fun :)