If you loved Cannibal! The Musical, try South Park: Post COVID: The Return of COVID
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Trey Parker, and they both carry the playful, unhinged mood tags, and they sit in Comedy territory. If that's the register that drew you to Cannibal! The Musical, the second film will land in a comparable space — through a different lens.
playfulunhinged
What South Park: Post COVID: The Return of COVID is
A holiday special about time travel and pandemics. Years after Covid destroyed the world, the boys must travel back in time to prevent the virus's initial outbreak. It did give Matt Stone and Trey Parker an excuse to trot out Professor Chaos again.

