LEGO Batman 2: DC Superheroes now has a demo released for it. As far as I know, it is released for Playstation 3, Xbox 360 and PC but if you find the demo appearing on other consoles please let me know.
The demo features the first mission of the game where Bruce Wayne and Lex Luthor are attending an awards ceremony where one of these men will win the Man of The Year award. Clancy Brown returns as Lex Luthor which is pretty amazing. After the Man of The Year winner is announced, The Joker and some more of Batman's rogues interrupt the ceremony so Batman and Robin have to change into costume and fight off the baddies to save the ceremony. The demo doesn't carry free-roam. The demo allows co-operative local play.
You can download the demo on
Xbox Live by clicking this link. Sign into your gamertag and you can instantly have it download to your Xbox console.
You can check out the launch trailer
here.