During the Credits
There are no extras during the credits of X-Men: Apocalypse.
After the Credits
There is a stinger after the credits of X-Men: Apocalypse.
In the extra scene, an Essex agent is shown inside Stryker’s prison retrieving a blood sample from Wolverine that’s labeled “Weapon-X.” After taking the Weapon-X sample, the agent puts it inside an Essex Corp briefcase (referring to Nathaniel Essex aka Mister Sinister).
Special thanks to Paquito Mate, Philip Kenny, drnoorhazfalinda, Jezamiah for the stinger submissions!