The Green Hornet/YMMV

These things about  are subjective - not everyone will agree with all of them.

General

 * Adaptation Displacement: For baby boomers, the 60s television adaptation pretty much completely displaced the original radio series and movie serials in their consciousness. Later generations are familiar with the property primarily through the NOW Comics and Dynamite Entertainment comics series, and have little (if any) familiarity with either the radio series/movie serials or the TV series.
 * Ensemble Darkhorse: Thrown all across the board with Kato throughout the franchise. He began as a simple sidekick but over the years, he grew into popularity. Most modern versions have Kato as the muscle while Green Hornet was the central figure. In the movie, everything is taken to the next level. Kato was basically responsible for everything that the team did, from the gadgets to being the muscle. While Britt is still the main character and the one calling the shots. The movie does involve them clashing with each other over who was in charge. Most people agreed that Kato was the best part of the movie, so it's likely they intended the movie to be like this.

Comic Series

 * Shipping: Britt Reid and Casey Case. Hinted at in the radio series (in at least one episode Sentinel reporter Ed Lowery banters with Miss Case about her harboring a crush on Reid). Subtly made part of the subtext in the television adaptation in at least two episodes ("The Frog is a Deadly Weapon" and "Invasion from Outer Space"), in spite of firm insistence by creator George W. Trendle that the relationship between Case and Reid be kept strictly professional. Made "canon" in NOW Comics's "Hornetverse", where Britt Reid II marries Casey Case after his retirement (Trendle having died in 1972, the subsequent rightsholders apparently discarded any objections to a Reid-Case romantic relationship).

TV Series

 * Ear Worm: The theme song.