Wuthering Waves better not just be teasing us with this darker storyline in the PVs/trailers. This could be a real turn for the 4.x storyline (certainly could even be two chapters with old war stories unravelled into a new conflict for the two parts, much like 2.x was new Ragunna and old Septimont). The anime trailer in particular could have come straight out of Reverse 1999.