My Plot Idea for Jurassic Park 4

I just came up with a great idea for a plot for Jurassic Park 4. Here's what I had. What if we had the dinosaurs of Isla Nublar get off the island and start terrorizing Los Angeles, and the 3 new main characters (if there are any) unite to try and kill the rampaging dinosaurs before they destroy Los Angeles. I think it'd be interesting. We got something similar when the T-Rex attacked San Diego. But, what would make this even better was while the Lost World had only ONE dinosaur destroy San Diego, imagine many dinosaurs wreaking havoc on Los Angeles. I think that would be SO cool if done right. What do you think of my idea?