Played some last night and this morning, along with my son. It's pretty fun so far. We got stuck in a few areas, not realizing what we had to do to move forward. But we eventually figured it out. The Batarang throwing thing took a few minutes to figure out, and they've done some neat things with having different costumes to accomplish different things. We also played as the villains this morning (Riddler and Clayface), and that was interesting--you play through the "same" story as Batman & Robin, but you're the villains this time.
Oh, and Robin is a complete idiot in the cut scenes, which is kind of funny. Lots of the music from the movies, and odes to scenes from the movies (when you're the Riddler, you can mind control certain people using your cane--like in Batman Forever). The villains I've seen so far: Joker, Riddler, Clayface, Poison Ivy, Mr. Freeze, Penguin, Catwoman, Killer Moth(!), Bane, Killer Croc. Heroes so far: Batman, Robin, Batgirl, Nightwing, Commissioner Gordon, Alfred, Bruce Wayne.
The "True Jedi" equivalent is "Super Hero" or "Super Villain". You also do scenes driving vehicles like the Batmobile, Robin's Batcycle, etc. These are similar to the spaceship missions in Lego SW. Also, the fighting is kind of funny--instead of just punching, you do all kinds of flips, kicks, punches, and you can grab guys and throw them, punch them, etc. The main working place (like the University in Lego Indiana Jones) is the Batcave for the heroes, and Arkham Asylum for the villains.