I definitely agree with a tournament section, especially with the many different game modes possible, and even the many different games viable for online play at this current time.
(EG: Cod MW3 (Strictly Secondary Weapons, Or Strictly Knives, etc)
There could even be proper prize tournaments with a buy-in sort of thing.
Assembly a Team of 4 with a $20 Buy-in and who ever wins gets the payout. Etc. (Would probably need to be done with a middle man, and competitors would probably have to have some rep / posts for them as it's a money tournament)
So yeah, This could turn out to be a big success, or a big fail (The section that is)