Kreator's last album was in 2012, so it's time for some new music! At least we're 99.9% sure it's time for some new music – all signs point toward that. The band had begun posting a photo in Greek that read "Θεοί της βίας" for a web address.
That translates to Gods of Violence in English, and once you go to the site, you're greeted with a video that I can't embed here because it's set to certain privacies.
If my math is right, the countdown at the bottom will end on October 28, at which point pre-orders will become available. So yeah, it's probably a new album, and the teaser sounds pretty good! So that's something to be excited about.