Did you ever watch Dragon Ball Z? Did you know that the company of Dragon Ball Z, namely Toei held a vote for the favorite Dragon Ball film in Japan? Among different series of the Dragon Ball Z series, Japanese people choose the best one.
The result was surprised many people in Japan that it comes out the result is Dragon Ball Z: Fusion Reborn. In the film, it was told that the two main characters: Goku and Vegeta must unite in order to be strong enough to defeat the demon Janemba.