You have it completely flipped with Guerrilla studios, it's Guerrilla games that will definitely show their open world dino rpg at E3, they've been slit into two teams for quite a long time. Shinobi and Verendus are very confident it'll be at E3 with a "full reveal" meaning gameplay for 2016 release. It's Cambridge that most likely just started development for their PS4 game.
"There is only one race, the pathetic begging race"