When will 343 industries be showin off Halo CE anniversary again?
Any events similar to gamescon, e3, and halofest coming up?
November 15, 2011
But i don’t wanna wait 2 months :[
Well maybe if you wish really really hard it will come out early 
Halo CE Anniversary will be shown and playable at the Eurogamer Expo at Earls Court arena in London from the 22nd to the 25th of September.
http://www.eurogamer.net/expo/
Thank you!
BS Angel said that new info will be introduced at the Tokyo Game Show.