It's unknown at this point whether the Cybermen will be the main focus of the story of whether they'll just be pushed to the side to make way for someone else, again. The Doctor falls off a Radio Tower and begins to regenerate. His companions- Nardole, Cyberbill, Cyberbrig, Door and Pete - all take to his side. The Doctor, weak and with much difficulty, beings to console his loyal companions: "Ah fuckity bye."