Well, look, to make a gigantic game we are always ready for. This time we wanted to make something special in terms of Warhammer background. No matter who writes the story. In fact, GW did, not Empire, nor Chaos. The funny thing is to follow strickly what background says, at least this is the way we understant it. Thare are a lot of "large" games with 8.000 or 10.000 points per side BUT which armies are unreal and impossibe alliances, only to addsome friends/armies to make a larger battle. We don't it. For sure, Chaos dwarves are close to Warriors of Chaos than others. But, then, why not also Skavens? And, also, Chaos Dwarves pray to Hashut, not the 4 Chaos Gods as Beastmen and Daemons do.
This is also the reason to reduce to weight of ogres in the battle. Their Army book stated they fought on both sides on that battle, and I have a apinted army of 8.000 points of them. But this would take importance to the main armies confrontation, that is: Empire vs Warriors of Chaos. So qe only add some 2 infantry units of ogres with chaos (and also with conversions to make them a little bit chaostic style) and a large unit of maneaters with Empire.
We could say the same for High Elves or Dwarves, but we decided to reduce them to a 2.500 points army.
On the other hand... don't be sad. When the ashes of this battle comes down, we'll make a large campaign recreating more historical battles (Including End of Times ones). Then I will have to call my german friend and general Mr. Parerson, who will assemble his chaos dwarves army (oldhammer) to fight against Grasientus and then versus Grimgor. Will be no rest for us....