While it is currently only up in 360p, Kyousogiga – a one-shot anime collaboration between Toei Animation and Banpresto (and released by Namco Bandai Games) is now available for streaming on Youtube without any region restrictions until the 15th January 2012. The following is a brief plot summary:
Three kids are stuck in a strange city causing massive mayhem through the land. They are searching for an atypical rabbit in order to return home. Koto, the eldest of the three, seems to have some sort of connection to this weird place ruled by a monk, a demon, and a priest.
While there is no word of this being expanded further, you never know… if it proves successful enough we might just see a series based on it.