Welcome to Flyertalk!
Unfortunately, it is highly unlikely you will have the New Generation Club World as the 777s ex-LGW are not due to be refitted until next summer. Further details are here:
http://www.flyertalk.com/forum/showthread.php?t=633240
However, apart from the lack of AVOD (which is not being installed on all 777s anyway even after the refit), the old NCW is perfectly fine. In fact, some people have expressed a preference for it in the past.
Enjoy your trip!