Quote Originally Posted by Avaris View Post
Will that include a way of allowing other chaos armies to summon them without taking a detachment? Of will they be solely their own thing?
I strongly believe that GW needs to remove the Summoning rules altogether:
It's broken in Open Play, and it's worthless in Matched Play.
It has no place in the current game - and I'm not convinced that it ever did. It should never have been anything except a different way of saying 'Reinforcements/Deep Strike'.

That is, potentially, 'Summoned' might be an alternate Deployment that all Daemon units might have. That is, any Daemonic unit can be placed into Reinforcements without spending any CPs. During your Reinforcements step, you can place a Daemonic unit within 9" of one of your Chaos Character models.