The copyright to the original Tremors screenplay is now back in the hands of its creators at Stampede Entertainment
In short, Stampede created Tremors, it’s three sequels and the 13 episode television series. They wrote a script for a fifth film, but Universal decided that it didn’t want any help from the creators.
Universal went ahead with its own ideas and created films 5, 6 & 7, which are frankly crap. Now Stampede has the rights back to the original film, they can make their own sequels with graboids and characters from that first story. They can’t use anyone, or creatures from the rest of the film series. That’s a bit of a shame as I really like the Shriekers from Tremors 2.
But the tongues don’t have teeth? That is definitely the tip/head of a tongue but the movie doesn’t show teeth on them. Remember the one that they pulled off of Earl’s axel? No teeth.
Looks like if they didn’t have teeth I the movie, they were supposed to. Here’s a promo picture for the movie.