In addition to the above pic, here are the rest of the rumors so far courtesy of /tg/:
"All units have an assigned role.Leader, Battleline, Behemoth, Artillery, no role.Depending on points you play you are required/limited on number of units of each type you can take. Lets say we play 1000pts battle.In that case you are required to take 2+ Battleline units1-4 Leaders0-2 Behemoths0-2 ArtilleryAny number of no role unitsSome units have both types so they take up both slots at once.Some units can become battleline if you take specific leader
Somehow I missed the part about summoning while taking photos but as far as I remember it works along the lines:We play 1000 pts battleYou can decide to spent any of those points on summoning. So lets say you take 700 points on field and 300 points are "held in reserve: as summoning.You summon any unit within said 300 points limit later in game. Points are used for summon so no recycling.
Armies build entirely of one Alliance are given extra rule. Generals can take 1 extra ability out of 6 predefined ones. Also there are 6 artefacts that can be taken by heroes at no additional cost.
Each alliance has its own set of1 Battle Trait6 Command Traits for your general6 Artefacts that "any (non-unique) hero can be given one..."Battle traits areDeath: For each wount or mortal wound suffered by DEATH unit within your army that is within 10" of your General or another Hero from your army, roll a die. On a 6 or more the wound is negated.Destruction: Roll a dice in your hero phase for each unit from your army that is within 6" of General or another Hero from your army. The unit can move a number of inches equal to the dice roll, as if it were movement phase, but cannot run. This does not affect their ability to move again later in the turn.
Chaos: Roll a dice when you pick a Chaos unit to attack in combat that is within 8" of general or other your hero. On a roll of 6 you can add 1 to all hit rolls for the unit in that phase.Order: You can re-roll battleshock tests (in battleshock phase) for friendly Order units that are within 12" of general or other hero in your army.
(order artifacts. chose one, no roll)
1. Attack in combat before anyone else (one use potion)2. Improve Rend by 1, not for mounts3. +1 Damage for one weapon4. -1 to To Hit for enemies you wounded (for rest of battle)5. Once per battle -1 to Hit for all enemies agains model with this artefact6. Heal 1 wound in each of your hero phases. "