User blog comment:Barryravage23/Phase 4 Idea's and Prediction's./@comment-29588684-20160604211758/@comment-29239821-20160726002733

Murdoc was kind of wearing 50's clothes in one picture, with a knife out. So maybe Gorillaz is going for a more 50's and 70's feel to how they look.

Then again, it could be Jamie experimenting with different looks for the characters. I could be wrong though.