Well looks like you could argue with yourself eternally for the entire crusade. See what I did there?
wow, I'm somewhat surprised that Word Bearers are up there....awesome, hope they make it to the final game.
World Eaters, I think I've seen an interview mention that there will be bands of World Eater scattered across the battlefield among the Tyranid territory. Although World Eaters currently are splint into different warbands rather then a legion, which is a shame... So it's unlikely they will be playable, but there is still a chance.
Even if there's not, you will still be able to collect skulls. As most likely Word Bearers will be included, and they pretty much serve Chaos Undivided, they do have ties with the World Eaters after all... Espically since both legions helped each other to bring death and despair to 21 worlds in ultramar during the Shadow Crusade.
A warcry or to put it better "the" warcry of the legion/chapter/... just by clicking like "enemy spotted". If you know what i mean, like a quick vox with a few phrases.
We were the monsters you wanted, the weapons you shaped us to be. We sacrificed all to be what you needed, and you dare .. you DARE .. censure us for doing that, for doing just what it was you wanted? We brought scores of worlds to compliance, and for every one we visited, for every one where they learned to fear the night, five, ten, twenty would surrender for fear they would be next. We are the ones betrayed. That assassin was allowed .. allowed, not able ... to take our father. To prove the truth of his words. Well, listen to the truth of my words. I will burn one world in the name of each of my brothers, and when the ashes of those worlds burn cold, my fathers words will be all that remains. Ave Dominus Nox.
Well I thought they would have put in the four God dedicated Legions. So you know World Eaters, Emperors Children, Death Guard and Thousand Sons. I just hope they put in Emperors Children as a playable warband. I would have to reconsider playing with the Eldar. =P