Looking at it now, 2012 pretty much was the end of Butler's career until 2016's current resurgence. Apart from a cameo in Movie 43 (4%, $32 million international gross), he only had one live-action role in this time, which was in Olympus Has Fallen, a movie with such a tepid reaction that its bigger-is-better sequel was given a lower budget than it because of a lack of bankability. Until Gods of Egypt, that was his only big live-action role in 2013, 2014, and 2015.
We're currently in 2016, which so far saw Butler star in Gods of Egypt and London Has Fallen, as well as a couple of yet-to-be-released films that likely won't be released until next year. With two straight bombs, after a period in which he was barely working, this very well could be it.
Of course, you may have noticed that I started categorizing his roles as "live-action" ones, and that's because of Butler's second big success: the How to Train Your Dragon films. The reason I've separated them is because while Butler has a fairly substantial role in them, their target audience consists primarily of children who don't know who he is (or don't care). It's true that they made money and were good films, but the amount of credit that can fall on Butler's shoulders is minimal at best. They're successful, but not because of him. It's like the punter in football on a Super Bowl winning team. They won the biggest prize there is, and he's certainly a part of it, but his importance is a lot less than almost everyone else involved. That includes, but is not limited to, the mascots, cheerleaders, and the audience watching on television.