I think the "joke superboss that looks exactly like a tutorial mob" trope from JRPGs could be productively adapted to all tabletop RPG settings. D&D campaign setting where the highest-level character in the world is a random goblin living in a fishing hut on a river just outside the player characters' home town. There's no complicated backstory explaining why this random goblin is like a 25th-level ranger – they just are.
Cyberpunk game where after many travails the player characters finally get to meet the leaders of the Resistance, and in addition to the expected cyborg rock stars and such, for some reason the shopping mall security guard the GM used to demo the stealth mechanics way back in session one is there.












