Oh boy, look at these illustrations (thanks duckroll, I can't get NT here, but if this month's issue is THAT good I might as well order it from the intertubes). While it was obvious this wasn't going to be a "serious" show, I guess these pretty much confirm my previous speculations.
Maybe it could very well be an over-the-top mecha show, along the lines of Gurren Lagann (which is the most recent example) and other not-so-serious-yet-interesting type of shows.
Koyama's character design looks nice!