I've been playing Persona 4 Arena since launch and twice now while playing with other people from the community we have come across a nice odd stage that seems to pop up randomly. Here is a video that I took with my phone in a hurry in order to get record of it since we failed last time to do so. This stage only last for one round and then it just randomly crashes for no good reason. You can also notice two characters that look like Noel from BB and a character from Guilty Gears or maybe Ragna. It also appears to have a health bar and some sort of super meter in the bottom. I've also tried to find information on it but I was unable to really find any information on it so anything you guys can find on it would be really cool. Also if you have seen this stage before say so in this topic.
http://www.youtube.com/watch?v=Hf8zucFyWI8&feature=plcp (excuse the crappy camera work.)