Batman Beyond: The Movie
Starring Will Friedle, Kevin Conroy, Michael Ansara, Linda Hamilton, Sherman Howard, Teri Garr, Seth Green, George Takei, Bruce Timm, Rino Romano
It's a animation and action & adventure movie, and has a rating of 8.1 out of 10 from Imdb which is very high for this kind of movie.
Watch it here
Not found streaming from Italy.