Welcome to the forum, first of all. It’s very nice to have a new member. About there being a new movie, it is unlikely, but not literally impossible. Universal Cartoon Studios shut down production of LBT media, but it’s not like they locked away all creative minds that can make such films on a deserted island and threw away the key. So in a sense, there could be another one, but the chances of that are sadly on par with winning the lottery. As for why it stopped, I personally don’t know, sorry. If there was an announced explanation for why they were stopped, people such as Landbeforetimelover, DarkHououmon, and Pokeplayer984 are experts on things like that and so could tell you if there was any news on the subject. I hope that you enjoy your stay here.
You're welcome,
The Friendly Sharptooth