LEGO Batman 2 is awesome.
Let me break it down; Lex Luthor loses Man of the Year to Bruce Wayne, madness ensues when the Joker breaks the ceremony, cue Bruce Wayne leaving and reappearing as Batman. He saves the day. But, an angry Lex has a new weapon used to let the villains of Gotham loose from Arkham Asylum, the Joker wreaking the most havok. Batman manages to re-capture most of the villains, but the Joker is still on the loose. The rest of the game is an epic story of cat vs. mouse searching and fighting in classic LEGO fashion. Destroying stuff and collecting studs. Unlocking characters and wreaking havok.
What's noteworthy about LEGO Batman 2 is the full voice cast, the open world Gotham, which, while not huge, is respectably big if you're running around as Batman instead of flying across the map as Superman. The graphics are impressive, it seems TT keeps outdoing themselves with the lighting and textures on a number of the models. Gameplay is classic LEGO gameplay. Jump, punch, switch character, special move and camera/movement.
I have to say, especially with how the game ends, I'm very excited for LEGO Batman 3, which will be set in space featuring a different villain, Green Lantern's foe Brainiac.