Yes. It is either the most influential or one of the most influential ones.
Regarding the movie: I wonder if Toriyama's involvement will have a good effect over the final product. I have watched all DB movies and most of DBZ films and... At the beginning I enjoyed them, but later I had to admit they were pretty average at best...
When I think about it, movies based on anime shows based on manga series often do not turn out well. Most of Naruto and Saint Seiya movies were pretty bad. The Fist of North Star animated movie was mediocre...
Then again, Ranma movies were decent. And Patlabor were quite good.
My point is: Did you like the old DBZ movies? And if you didn't, you think this movie can be better since Toriyama is involved?