OK, I found some existing screenshots, since I was sworn to secrecy (any leaks could lead to no more Halo 2 untill the rest of the world gets it) I realise these have been around for a while, so no real new info here, but I just wanted to put things in perspective.
There's something about being able to choose weather to be a Masterchief or an alien in Multi that adds to the fun. (note the guy jumping on the hood of the ghost)
This is an excellent wepon combo, riddle with bullets whith one hand and charge your pistol in the other
Prove your masculinity in a good ol' fasioned sword fight
The huge comlex levels are incredible! (note the overturned warthog on one side of the screen and what apears to be a detached tire on the other

)