My local GW store has a copy of Battle Missions that we've been using to play some scenarios. We're already planning a Kill Tam campaign using the new book that we can start up at release time. Near the back of the book there are rules for Kill Team, but composition rules are a little different than the old rules.
Kill Teams can be a maximum of 200
Force organization consists of...
- 0-1 Elites
- 0-2 Troops
- 0-1 Fast Attack
From what I read, there are no defined vehicle restrictions either, so you could in essence pack a squad of veterans in a Valkyrie, or drop a Dreadnought in your Kill Team. I think it's an oversight, but we've encountered a lot of those in the book already.
Missions are played until you are reduced to below 50% of your starting force.
Each Kill Team can have up to three models that can be given special abilities. These are the standard abilities like Fearless, Relentless, Furious Charge, Fleet, etc. There is a blurb about modeling these special characters to represent their ability, but of course it's optional.
I'll try to add more the next time I'm in and absorb some more details, but for now you all can start retooling your Kill Teams to the above listed points and force organization.