The theme song, by Jamosa, has been announced as "Love Ain't Easy", to be released on an album of the same name on 24/9. No previews yet, but will add them as they come out (there's meant to be one soon).
Jamosa is most famous for "Nani ka Hitotsu", which got a bunch of downloads a few years back:
Are we hopeful that it might be tolerable? Already picking up the pitchforks? What would you have chosen as the theme song if you were in charge? Is there a particular Amano song you would have used, or any other artist you think would be good for the film?