One of the very best parts of Rocksteady's Batman: Arkham City is the fully explorable Gotham City. Unfortunately, that has now been rendered irrelevant as long as you don't care too much that LEGO Batman 2: DC Super Heroes's fully explorable city is, well, made from Legos.
LEGO Batman 2: DC Super Heroes (or the ridiculously shortened-but-still-too-long LB2: DCSH) also features the full pantheon of DC super heroes (aka, the super heroes whose movies' bomb - except for you, Batman), vehicles, quests, and, of course, collectible LEGO blocks. The kid inside of all of us just vomited with excitement. Gross.