While there is no confirmation on how many, fans have been getting a chance to play the Lego Batman 3 Game at San Diego Comic con today, the Instagram account posted a picture of a fan *(adult) and a Child playing the game with the following caption.
"Some lucky fans are getting their hands on with LEGO Batman 3."
in the picture on their account you can see the level's current objective is a classic Lego game feature of collecting 3 items, it should also be noted that the level looks to NOT be taking place in the Batcave but the Demo was rumor to be in the batcave.
if you attended the event and played the demo of the game please feel free to share your experience in the comments section.