I really don't think they are going with the Resident Evil approach to this show, or even the Dead Rising approach. I don't think there will be any 'bosses' in this show.
So it turns out the indie J-rock band that performs the HSotD OP (Kishida Kyoudan and the Akeboshi Rockets) have an album they released all the way back in 2008 - "Literal World". I need to track this down somehow, I know that Japanese music CD releases tend to have limited print runs and then vanish forever unless the band is fuck-all huge. They have this combination indie punk-rock sound which I really like. You can listen the B-side on the HSotD OP single here:
http://www.youtube.com/watch?v=ivj0Evi2AfM