I know its not happening yet but I'd looooove Perfect Dark 2 as a more stealth oriented shooter in the style of the Samaritan demo.
What they need to do is take Joanna and push her into an action-adventure game.
I want a third-person, Uncharted style game set in a Bladerunner style world, as Joanna goes around stealthily taking down dataDyne from the inside out.