I honestly find Nihilego's concept far more interesting than any of the box legends from any generation. I was really hoping USUM would expand on it (complete with having fused Lusamine as a fightable opponent) and the other UBs as just an invading menace. But with this "world where Necrozma has stolen the light" stuff, it feels like a step back to the lame Gen 3-6 plots where legends are like gods.