There needs to be more demonstration of support. Here's a good group with almost 30,000 members- hopefully this will influence Crytek's decision to create what the world needs; an imaginative, plot-heavy, silly FPS.Crytek boss Cevat Yerli explained that recent fan interest in the series was "quite high", but still not enough.
http://www.facebook.com/Timesplitters4PLZ
If you haven't played a Timesplitters game yet, go do so right away. Future Perfect is undoubtably one of the greatest FPSs of all-time.