At the end of "Peppa Gets A New Car!", he was told by Peppa that he and Sally were invited to a picnic with Zoë Zebra, Candy Cat, Thomas the Tank Engine and Freddy Fox. In Cars: Fast as Lightning, it reveals him that he is telling Todd Marcus that he is hosting a track-building/racing extravaganza.
In Cars 2, he makes new friends with an Italian F1 racer named Francesco Bernoulli, a British racer named Lewis Hamilton, an American racer named Jeff Gorvette, a Spanish racer, a French racer, a Japanese racer, a Republic of New Rearendia racer, a Brazilian racer, a German racer and another British racer. His catchphrases are "Speed, I am speed.", "I am faster than fast. I am quicker than quick. I am Lightning.", "Ka-chow!" and "Ten four, Mater!". He also came to help Ruby "Easy" Oaks find his missing grille in "Ruby Loses His Grille".
In the upcoming Peppa Pig Galaxy (as well as Lio's fandom), Lightning McQueen will say to people that Cars is Pixar's Best Work, and if the people say that Cars Sucks, Lightning McQueen will s*** on them.