So, essentially what happened is that he appeared at the Tottenham Hotspur Concert filling in for Alan (the Muppet guy who brings the Algorithmic Atrophy button on stage). Now if you don't know, the Boogieman is the main villain of Plastic Beach, he's a rejected fifth horseman of the Four Horsemen of the Apocalypse, and his real name is Flatulence and he's meant to be all the evil in the world (especially the evil in Murdoc) embodied in one single entity. To make a long story short, he's pretty important and the last we heard of him was in an interview where Damon and Jamie said that he and the Evangelist (who's a whole different thing) were in Shepton Mallet. So this makes me curious, are they bringing him back into the modern lore, or is this just a neat bit of fan service because they couldn't get the Alan suit in time or somethin. IDK
Song used: Tranz - Gorillaz Gorillaz by Damon Albarn and Jamie Hewlett