What does that mean? Stampede are behind Tremors 1➡️4, and the 13 episode television series. A script was written for film 5 but Universal went their own way without any help from Stampede.
That's why films 5,6 and 7 are terrible.
Now Stampede has the rights back for the first film, (anything from other films are still Universals), and so a new sequel with surviving cast members could be on the cards.
The Tremors rights are back in the hands of Stampede Entertainment
https://www.joblo.com/tremors-rights/