Here is a new game idea: A real-time-strategy game in which you are stranded on a deserted island inhabited with dinosaurs and must gather supplies and build up your defenses to survive. The game will have a set of levels, the earlier levels only contain small dinosaurs that are easily dealt with and basic structures to build. As you progress through the levels you unlock new structures and are attacked by larger, more dangerous dinosaurs.
Multiplayer would be a great feature to add to this game. What's more fun than building up a fortress with your friends and surviving waves of dinosaur attacks? There could also be a PvP mode where two players build dinosaurs to attack each others bases and you would have some classic RTS gameplay.