Currently the name of the first live film is Scooby-Doo (film), but while it can be changed in sentences to "Scooby-Doo" with the buffer (or whatever the technical term for it is), I think it would be all around better to refer to it as "Scooby-Doo: The Movie" (the alternative title that has been used on DVDs). I don't mean to rename the article (as "Scooby-Doo" is the true title of the film), but in sentences, even in categories, for it be renamed to "Scooby-Doo: The Movie", as that just looks better than "Scooby-Doo (film)". It feels like we're treating as if it's been chiselled in digital stone, but I don't think it looks that great, because saying "Scooby-Doo" alone without "Scooby-Doo 2: Monsters Unleashed" makes it more ambiguous. It depends what you're writing about or what's already been written, but I think in headers and in categories, and in regular sentences, "Scooby-Doo: The Movie" does make for a better title.