Although it wasn’t shown at the press screening that previously took place a few weeks back, there is actually a post-credits scene at the end of Bryan Singer’s X-Men: Apocalypse. This scene has actually been viewed and confirmed by the good folks over at Bleeding Cool, who were also nice enough to give us a brief description of it as well.
“We see a besuited man walking through the remains of the Weapon X clean-up programme, removing the blood, bodies and bullets. And a suited man retrieving vials of Wolverine’s blood labelled Weapon X. And placing them into his briefcase which contains other vials of differing colours. Slamming shut, it is labelled ESSEX CORP.”
Essex Corp. is owned by Nathaniel Essex, better known as Mr Sinister. He is most likely the suited man walking through and collecting the remains of Weapon X in the scene. He himself is a mutant and also the world’s greatest geneticist, capable of cloning, creating, enhancing, and controlling mutant abilities.
X-Men: Apocalypse is set to be released on May 27th.