We can talk about Marvel all day — the various phases, overlapping storylines, cameos, and Disney+ tie-ins. Or we could noodle over the equally expansive Star Wars universe (#InFiloniWeTrust). If you want to get historical, you can take it back to Maria Ouspenskaya and the Universal Classic Monsters, which kickstarted the notion of shared film universes way back in 1943 with Frankenstein Meets the Wolf Man. But let's not overlook one of pop culture's most enduring and homespun extended universes: The Saturday Night Live spin-off adaptation.