Sinister about Nathaniel Essex of course. Written by Waid or Gillen..simply he remains a villain but all his actions are seen from his pov. Have him cross paths with Stark, Richards, High Evolutionary, the new young jean, Black Panther, Spider Man, and even Cyclops. Have a huge confrontation with Apocalypse..build it up..go over the history..The chess moves. All of it. Also just show him interact with regular people under his shape shifting abilities to show how cruel and manipulative he is to everyday people.