Apparently when they said it was the end of the Jurassic era, it was, no joke, a mistake between the story writers and the advertisers. The director himself said it should have been worded differently. To answer your second question, dinosaurs are in the wild! I get it was kinda the premise with the last movie but it wasn't explored very well since half of the movie takes place in one area, but I can see them making a movie about that