The trailer in question is for Hell Yeah! Wrath of the Dead Rabbit, by the way--which is being developed by Arkedo and published by Sega. It'll hit PSN and XBLA in late September (Sept. 25 and 26, respectively and specifically) and PC on Oct. 3. Oh, and all three releases will have $14.99 price tags attached to them.
I loved Arkedo Series - 03 Pixel!, so I'm seriously considering picking up the XBLA version of Hell Yeah! Wrath of the Dead Rabbit. The only things that may keep me from doing so are the above-mentioned price tag and the fact that so much is going on in the trailer above that I'm a bit worried that playing this game could be an overwhelming (in a bad way) experience.