South Park: Post COVID

Kenny hid his flash drive inside his rectum to protect his time-travel research data from being discovered by others. This mirrors his discovery that Randy had smuggled marijuana seeds inside his own body, which caused the pandemic. Kenny believed that hiding the data within the privacy of his own body was the safest way to ensure only his closest friends would find it by retracing their steps.

Earlier in the film, Randy admits to smuggling marijuana seeds inside his body, which Kenny apparently learned about and replicated as his own concealment method.

Randy confesses that he smuggled marijuana seeds inside his body when returning from a trip, which inadvertently started the COVID-19 pandemic. This shocking revelation connects Randy's personal actions to the global catastrophe, explaining the origin of the virus in the film's universe.

During Kenny's wake, Stan notices a reference to 'Tegridy Weed' in Kenny's notes, hinting at the connection between Randy's farm and the virus origins.

Stan burned down Tegridy Farms in a moment of destructive frustration after his ongoing quarrel with Randy. The feud had escalated following the divorce from Sharon and Randy's refusal to relinquish control of the farm. Stan's anger overcame him, leading to the tragic fire that killed his sister Shelley.

The ongoing tension between Stan and Randy over Tegridy Farms and Sharon's divorce builds throughout the quarantine period.

Kenny had been working on a secret time travel project in the school's basement laboratory in an attempt to stop the pandemic from ever happening. His research had progressed significantly, and the flash drive contained video evidence of his experiment. A colleague in the video explains that the friends' actions drove them apart and contributed to the dystopian future.

The friends discover Kenny's secret laboratory hidden beneath the school, revealing the true extent of his scientific work.

Victor Chouce is revealed to be Butters Stotch in disguise at the asylum. The name 'Chouce' is a mispronunciation of 'Chaos,' which points to Butters' involvement in the larger conspiracy surrounding Kenny's research and the pandemic's origins.

The clue 'Chouce' as a mispronunciation of 'Chaos' is planted earlier when the friends try to contact Kenny’s surviving associate.

Cartman initially volunteers to help finish Kenny's time-travel work out of concern for his family, but ultimately flees with his family rather than allow any changes to the future. He chooses self-preservation and protecting his own family over risking alterations that could affect his own existence.

Cartman's self-centered nature is established throughout, and his reluctance to sacrifice his comfortable future becomes clear when he learns the risks involved.

Shelley Marsh died when Stan accidentally burned down Tegridy Farms while she was inside the barn. This tragic event occurred during Stan's destructive rampage following his heated argument with Randy, and it devastatingly deepens the rift between Stan and his father.

The escalating quarrel between Stan and Randy over the farm and divorce builds tension before the fatal fire.

In Kenny's time-travel video, a colleague explains that the main group of friends, Stan, Kyle, Cartman, and Kenny himself, drove apart due to their inability to work together during the crisis. Their fractured friendship and failure to cooperate contributed to the dystopian future that unfolded, making them partially responsible for the world's decline.

The film establishes early on that the friends have drifted apart over the 40-year period, living separate lives.

Clyde refuses to get vaccinated, which prevents the group from visiting Victor Chouce at the asylum since vaccination is required for entry. This plot point adds to the comedic commentary on vaccine hesitancy while creating a practical obstacle for the friends' investigation.

The vaccine resistance is mentioned when the group plans their trip to the asylum.

Kenny died from a new COVID-19 variant while researching the origins of the virus and attempting to develop a cure. A scientist confirms at his funeral that his death was tied to this new variant, which also triggers the town-wide quarantine in South Park.

Stan receives news of Kenny's death at the beginning of the film, setting the entire plot in motion.

Eric Cartman converted to Judaism and became a rabbi, raising skepticism from Kyle. This surprising character transformation is shown at Kenny's wake, where Cartman appears with his own family. The film doesn't deeply explain this change, presenting it as one of the many ways the characters have evolved over the 40-year time jump.

Cartman's presence at Kenny's wake with his family establishes his new identity early in the film.

Randy discovers a small marijuana sprout growing in the ruins of Tegridy Farms and vows to protect it. This closing image symbolically links back to the farm's origins and Randy's involvement in the pandemic, while also representing resilience and the cyclical nature of the story's themes.

The sprout connects back to Randy's earlier confession about smuggling seeds and Tegridy Farms' legacy.