The track is meant to be a teaser for the 12 minute epic that is due to be released on the Gorillaz website in the coming weeks.
For further reading: Pitchfork has an interview with James Murphy and Damon Albarn about the collab here.
You can download the track from the Converse website
*Edit: The above is a stream for you to listen to. Please excuse the end of the track, some genius has decided to spam for a new Outkast album by uploading their own version. Best to get it straight from Converse...