Pictures have been leaked online from Lego of a brand new Star Wars set the 10221 Super Star Destroyer. Besides the name, Number and picture there is no other info available but if you would like to learn more about what the Super Star Destroyer is you can check out the Wookiepedia article Here
The set appears to have 5 Minifigures, Bossk, IG-88, Dengar, an Imperial Officer and Darth Vader as well as a very small comparison model of a regular Star Destroyer. I would have liked to see this contain some rarer minifigures because of it being a UCS (Ultimate Collectors Series) set as well as the fact that I'm sure it will be vary highly priced.
Here is a picture of the set: