This just in (two days ago): Pixar has announced it's next four movies - Brave, Monster University, an Untitled Pixar Film about Dinosaurs, and an Untitled Pixar Film that Takes Place in Your Mind!
They specifically say,
"What if the cataclysmic asteroid that forever changed life on Earth actually missed the planet completely and giant dinosaurs never became extinct? This hilarious, heartfelt and original tale is directed by Bob Peterson (co-director/writer, "Up;" writer, "Finding Nemo") and produced by John Walker ("The Incredibles," "The Iron Giant")."
Cool, right? Let's hope it's similar to the first 5 minutes of Disney's Dinosaur (2000)...
Also, Ted Moskovich has created this homage to Allan Grant's speech from Jurassic Park!
Raptor from Tal Moskovich on Vimeo.