Spoiler: Michael is playing two robots in Alien: Covenant
In the new interview about Assassin's Creed, where he also plays two different characters, Fassbender said that he did the same for Alien: Covenant.
Despite the obvious challenge on playing two characters in a single film, the magnitude of the task didn't dawn on Fasabensler till he was on the set of his next mode "It only really occurred to me - it sounds bizarre - but I just did Alien [Covenant]. I'm playing two robots in that. I thought, *beep* I've just done two films where I'm playing two characters, people will think I'm narcissistic and greedy!"
http://i.imgur.com/wmIUeTH.jpg
Nolan, I love you forever!