Should be paired with something but I doubt It would be a new reworked track, if we got the Monsters leak it's just because someone record on one of the studios of this year so Monsters was always part of the plan.
Why not any more tracks have leaked if there were more? I think the intention was to put all this songs on the Vinyl, and then start the process of new music, but for quality they decides to drop it out and maybe they would save it for a future release, or maybe we won't hear an official versión after all