One little thing they mentioned though in the movie had me a little intrigued I'll admit. One of the scientists mentioned that none of the dinosaurs were natural, and that they had to use DNA from other things to fill in the gaps. If they had the full DNA from a dead dinosaur, they would probably look very different than how they are now. Which suggests to me that the way the dinosaurs look was intentional. They were made that way for marketing reasons. So that they would be recognizable to those who have seen pictures of what people theorized the dinosaurs looked like based on their remains.
If that were the case though, what was with those pterodactyl dinosaurs with the T-rex heads? Those just look silly and unnatural looking, and seem very unattractive from a marketing stand point.
I'm probably overthinking all this, but that's just how it seems to me.[/spoiler]