Which is the best Dragon Ball movie?

The best Dragon Ball movie was Dragon Ball Z: Broly - The Legendary Super Saiyan. In it, Vegeta was lured to the planet of New Vegeta. This was completed by a group of Saiyan survivors who were hoping he'd be the king of the new planet.

The problem was when he found out they had something else in mind, an ulterior motive, it all changed around. They wanted universal domination. So, Vegeta had to fight the legendary Super Saiyan, which was awesome.