The gods are back, and they're wrecking shit.
Turns out, what we imagined them to be is an idealized version of what they really are. They're actually horrible and corrupt, and they're laying waste to the countryside - trashing farms, villages, even churches.
All of those little rituals we associate with each god? Turns out they were just gentrified ways of remembering the atrocities they committed when they were here last time.
There are, of course, die-hards who, despite the evidence, claim that these are not the gods we pray to and that our real gods will save us. Are they right? Who knows. If they're impostors, the "real" gods are sure taking their time about getting here.