I expect some gothic low key production with a sparse pop beat produced by either Chuck Harmony ("Russian Roulette") or Brothers in Rhythm (Impossible Princess album). YES Ke$ha deliver pleeassseee!
This could either be a really introverted dark ballad, or it could be a dance-pop smash with INSANE beats and organ. Something along the lines of Rihanna's "Mad House".
I'm imagining this as an intro to the song, with organ playing in the background. Cue the demonic laugher... and then pounding synths with an underlying organ beat. SLAY.