Its Official Birusu the God of Destruction is the most powerful being in Dragon Ball.
He is feared by Kaio and Kaioshin.
He has been stated to be stronger than, Frieza, Cell and Buu. He also defeats Goku.
His job as the God of Destruction is to destroy celestial bodies and life. (Stars, Planets etc) This in some way maintains the balance of the Universe.
Piccolo states that if he is not stopped then the Galaxy could cease to exist.
So no? :)
The movie is canon. It takes place between Manga Chapters 517 and 518. It also has DEEP involvement with the Author Akira Toriyama.
With it fitting in the ORIGINAL MANGA story line and featuring deep involvement with the creator, i dont think you can get more canon than that in a movie. LOL
Unless the creator comes out and says it not part of the original story. T_T