Complex sentence: This show is notable for having a retcon of the events of the first movie as in the movie, Flint and Sam met in their adulthood, whereas in the TV show, they met in high school.
Split into simpler sentences: This show is notable for having a retcon of the events of the first movie. As in the movie, Flint and Sam met in their adulthood, whereas in the TV show, they met in high school.