Well its going to be starting at one instead of noon. (It seems to work better for most of the people planning on playing.) Other than that, the army restrictions for pitched battles are in the new Genera's Handbook. So at 1,000 points you can have the following:

1-4 -leaders
2+ -Battleline
0-2 -Artillery
0-2- Behemoths
any number - other units

If you don't have a copy of the general's handbook we have a store copy you are more than welcome to come in and use. Outside of the points and the restrictions above, all of the armies are available to be played. Hopefully this helps.