I've seen this a while ago and my opinion still stands, someone NEEDS to get this out to the WB and have them see it and show them that there is interest in getting this project made.
With the recent success of Sin City, 300, and most likely Watchman... I highly suspect they'll be looking for the next film adaptation to bring to the silver screen and this project is definitely it. Whoever directed this obviously knows the craft and knows how to translate the book to screen.
All I know is- if we show this to the WB, they might bring this guy in to do a feature film based upon this demonstration of what he can do for the property. Or they could put him on another from page to page to screen adaptation in the meantime due to the recent Batman films...
Get enough of the right people to see this and it could happen. Just like they made the sample of the possibility of adaptating 'Sin City', this should definitely be used as a sample for an Arkham Asylum film.
This guy may even be the next Guillermo del Toro. I don't know if I'm alone in this, but they're styles seem very very similar in nature. Watch Pan's Labyrinth and then compare the two.