These may be some good points, but I have to disagree with number 5:

"5. Do not limit your game to a single camera view. Try to create more than one different view so the player has options to choose."

This is possibly one of the worst things you can do when you are doing a game like this (in my opinion!). Creating a first person view or a 3rd person camera makes a completely different game which is mostly doomed to fail. (I only know one game that managed to combine 2 perspectives, that is the Jedi Knight series.)
Concentrate on one perspective, a 3rd person camera could fit nicely to a predator game I think, and adjust your gameplay accordingly.