My daughter loves the Cars so I've seen them tens of times and now I love them deeply.
Cars 2 is a real confusing one. My first viewing, I thought it was brilliant. Flint McMissle and Holly Shiftwell are fun secret agents, the international race is beautiful, I love Francesco Bernoulli he's so good, and there are many little touches that show the Pixar care. However, on repeated viewings it feels deeply conflicted like there were two factions in Pixar who wanted to make different movies and they got smooshed together.
One movie is a "normal" Cars movie about an international race, with Mater joining Lightning McQueen on the road and interfering with Lightning's races and embarrassing him. The arc of the movie is Mater learning to temper his antics and Lightning learning to accept Mater for who he is, with both of them embracing the "collision of worlds" (as described in the credits song). There would be existing and new plot beats, like the wasabi and toilet moments in Japan, the conversation in Italy with Luigi and Guido's family, maybe something new in London.
The other is a 30 minute Mater's Tall Tales about the time Mater was a secret agent. This is essentially all of the secret agent scenes from Cars 2, with Mater seeing the fight in the alley, flying in the airplane and knowing the lemon's engine from the photo, wearing the disguise at the bad guy meeting, getting captured and locked in Big Ben, etc. And at the end would be Lightning being like, "No way that happened" and then Holly Shiftwell coming down from the sky to be like, "You're wanted for another mission, Mater." and Lighting being gobsmacked as Mater pulls out a rocket to fly away.
Instead, we got a really messy and confusing movie that also raises some questions with fucked up answers about class in the Cars universe (why are some cars lemons? What does it mean to be born a lemon? Why is that poor car always breaking down when trying to leave town and paying for tows?????).
What's your favorite of the trilogy?