Devil May Cry 5 is real
The title appeared on his online profile and has since been deleted, and the actor has even responded to the story by saying that a role in the game was booked years ago but never came about.
So maybe he was just editing something which should have been deleted ages ago, or he got into a lot of trouble with the boss folk at Capcom. It has been a pretty insane eight years since we've had a numbered Devil May Cry game, with 2013s DmC presenting very different style of game which we actually kind of loved.