discovered by God of War fans on Reddit, a series of Nordic Runes can be spotted etched across the boat that Kratos and Atreus are rowing in the theme. Though they're hard to distinguish at first, zooming in and brightening up the image makes it as clear as day (as seen below), but what do they mean?
Well, translate the Runes into rough English, and it says "Ragnarok is coming." Oh boy! If you know your Norse mythology (or, alternatively, have seen Thor: Ragnarok), you'll know that this word holds a great deal of importance in the world of Gods and men, signalling the endtimes that essentially wipes out the entire inhabitants of the Nordic universe.