The Lego Batman: The Riddler Chase set has 304 bricks including 3 minifigures with assorted weapons and an accessory: never-before-seen Batman (with new suit) and The Flash and The Riddler (new suit too).
The Batmobile features a detachable cockpit and hidden flick missiles; Weapons include Batman's Batarang and a crowbar. The Riddler's dragster has a big engine, flames, huge rear wheels, money bags and a detachable bomb; Also includes a banana. In the photo below we have included the "older" Riddler so that you can see the differences.
The highlight of this set for us is the Flash minifigure, love it! And here's on the left the Batmobile that came with the Batcave set, and on the right the new one that came with this set.