Warner chose to end with “Joker” as the climax point at the end of the first official trailer. The circle brother personally guessed that there are five reasons: 1. The film of Zhenglian, which has its own special features, has its own destiny. There are still many passers-by who don’t understand what’s happening in the tragic and hard-won movie. They still have the question, “Isn’t this movie released in 17 years? Why is it now being announced?” Therefore, before the trailer was released, the film maker decided that the trailer must show as much as possible the differences from the theater version, telling people that these are two completely different movies. The “Future Nightmare Line” has appeared in the trailer for many times, and “Joker” is not mentioned in the theater version. The newly added character in this reshoot is naturally a good publicity. Opportunity, regardless of whether you have watched the 17-year theater version of “Justice League”, you will be attracted by the “Joker”. 2. The character of “Joker” may be one of the most popular villains in DC and even the entire history of American comics, and its status in the hearts of fans naturally needs no words. Using a highly popular villain to bind it to a movie trailer with the same popularity will undoubtedly double the publicity effect between audiences and fans. 3. In the previous 16-year movie “Suicide Squad”, the “Joker” played by Jared Leto was constantly disturbed. A large number of scenes were deleted and the film was re-cut, which also caused the future development of Leto’s version of “Joker”. Hit hard. Nowadays, while there are gradually requests on the Internet to release the voice of Ayer’s version of “Suicide Squad”, Za led Leto to throw an olive branch to invite him to perform. It is a heartwarming thing for Leto, but it is also a win-win for the future development of fans and characters. 4. The role of “Joker” makes the plot of “Future Nightmare Line” more complete and enables Zach to realize his vision to the greatest extent. Both ordinary viewers and fans will look forward to the plot of the feature film after seeing the trailer. 5. Since the last time “Batman” and his archenemy “Joker” met on the big screen, it was “The Dark Knight” directed by Nolan. Although DCEU has the appearance of these two characters, they cannot get together due to planning failure. In this trailer, the most popular hero and villain in the history of American comics are once again in the same frame, which can be regarded as fulfilling a wish in the hearts of fans.