"Destruction of the Sammer Kingdom - Super Paper Mario" is a high quality rip of "Destruction of the Sammer Kingdom" from the game Super Paper Mario.
Jokes
This rip begins with the opening theme of The Simpsons and after a few seconds, we hear the original track from the game (which is just sounds of The Void destroying the dimension Mario and his party were currently exploring). Homer's scream from the episode "Moaning Lisa" is heard towards the end, echoing into silence.
This is could be alluding that the Reboot is almost over.