Back in 2001, Cinemax and Lou Arnoff started a “Creature Features” series of films for Halloween 2001 loosely based on old AIP films. Three of these were based off of films on MST3K.
Teenage Caveman, which while containing the same basic premise, changes the plot to be about a banished group of teens finding an idealistic city ruled by two mutants who seek to populate the earth with their own master race. Directed by Larry Clark of Kids fame.
If I recall, Lou Arkoff planned another round of AIP remakes years ago but nothing ever came of it.
Of note, quite a few MST3K titles were on the roster: Viking Women & The Sea Serpent, She-Creature, Teenage Caveman (yes, they were gonna take another shot at 'em), The Undead, and War of The Colossal Beast. (Day The World Ended was used on MST3K: The Home Game if you want to get technical.) One can only imagine how those would’ve turned out.