I was just recently watching this video on youtube
YouTube - ‪Grand Canyon and Primeval World Diorama on the Disneyland Railroad‬‏
BTW, this video is not mine.
And I remember how much I loved dinosaurs as a kid, and I still do. When I was little, this part was the only reason of going on the train, besides also to relax my feet.
Anyways, I was thinking since we have all this new technology now,maybe they could make all the dinosaurs and the animals in the grand canyon more life like. Heck, maybe even get a better looking T-Rex. Give them all better/more movements ect... Of course after all the big changes are done at Disneyland park.