DietRob
i've been begging for over 5 years.
I think the truth is nobody wants to make this goddamn game.
The game dreamt about for so much time, sequel to a 14 year old game (ie : freaking dated in every aspect), pioneer only of things that nowadays have become utterly commonplace, or disliked, or irreplicable with today's production values and scale expectations (meaning you'd just look like you're doing what everyone else is doing but less good).
All of this only to be hated to death because you'd never live up to the fan's expectation.
Same reason for Half-Life 3.