I could see a game doing the common cartoon cliche where they parody popular stuff in different art styles. Every level is a different level of technology and art style, and possibly different gameplay.
>Halo 2600-esque atari game level
>Hotline Miami twin stick pixelshit level
>run & gun 8-bit pixelart level
>isometric shooter 16-bit pixelart level
>Doom/Wolfenstein 2d fps level
>RE low poly with pre rendered backgrounds tps level
>Ace of Spades type voxel fps with building level
>nufps hyper realistic slow shitty 3d gameplay with QTE glory kills level
>fast paced 3d arena shooter level
>asset flip pozzed battle royale level