In December 2021, the Disneyland version was updated to include a new plot element of Jessica Rabbit in the role of a detective who is determined to stop a crime wave in Toontown.

The ride would have had guests in spinning honey pots, but then-CEO Michael Eisner came in and asked Imagineers to switch gears and make an attraction inspired by Who Framed Roger Rabbit.

[12] In September 2021, it was announced that Walt Disney Imagineering would update the ride in Disneyland to include a new plot element of Jessica Rabbit in the role of a detective who is determined to stop a crime wave in Toontown.

[3][4] At the start of the ride's queue entering the Toontown Cab Company, some license plates hanging on the wall have code-like puns of various Disney characters or slogans.

They include 2N TOWN (Toontown), BB WOLF (Big Bad Wolf), MR TOAD (Mr. Toad), 1DRLND (Wonderland), 1D N PTR (Wendy & Peter), IM L8 ("I'm late" - The White Rabbit), CAP 10 HK (Captain Hook), L MERM8 (Little Mermaid), 101 DLMN (101 Dalmatians), FAN T C (Fantasy), RS2CAT (Aristocat), ZPD2DA (Zip-a-Dee-Doo-Dah), and 3 LIL PIGS (Three Little Pigs).

The queue winds its way through darkened Toontown streets and alleys, passing through the Ink and Paint Club's backstage areas including Jessica Rabbit's dressing room and the prop cage.

(In the U.S. version, guests then pass by a newspaper article stating that Jessica Rabbit, inspired by her friend Eddie Valiant, has become a Toontown private eye who is determined to stop the weasels' recent crime wave.)

In a window on an upper floor, the silhouettes of Smart Guy and Stupid can be seen, as guests pass through the weasels' hideout and Dip refinery.

Jessica is dressed in a detective's trench coat and fedora, standing behind Smart Guy with her arm held forward, directing the weasels to stop dumping Dip).

Upon exiting the shop, the cars travel down Spin Street, where Toon fire hydrants, telephone poles, mailboxes, and streetlights laugh and dance around.

Next, the cabs enter the Toontown Power House, where they pass a furnace with an abstract face and encounter Roger having an electricity fight with Psycho.

[5][17] The ride's queue line was originally planned to have an outdoor section with Mickey Mouse, Donald Duck, Goofy, Roger Rabbit and Benny the Cab's handprints and footprints in a slab of wet cement.

Steinmeyer helped the Imagineers create the portable hole effect with a simple magic trick, coming up with a "brilliant solution" involving a sliding tunnel with mirrors on its sides, which was built in the ride.