Looks like the rivalries will affect diplomacy among the daemon factions and Khorne in particular gets diplomatic debuffs from various sources, which, fair. This is apparently different for Slaanesh but only hints so far on what form that will take. Daemon factions are automatically at war with non-daemon factions with the exception of Norsca, WoC, Beastmen and, interestingly, Skaven. Most interesting is some info about diplomacy. Most amusing is definitely 'Eternal War' which 'Spawns a small Khornate army to attack your own army (triggering bloodletting, giving you skulls, favour, and XP from the battle.)' Hilarious and on brand.

Same Unholy Manifestations and cults as Tzeentch but with different effects. The more armies you have the more you receive factionwide buffs. But they spawn with full movement and can themselves spawn additional armies. It's not 100% clear to me whether these 'Blood Hunt' armies are like Hellebron's Blood Voyage armies or if they are controlled by the player. Razing settlements can generate armies (without replenishment or recruitment). News for the News god, Articles for the Article throne.