Word Bearers are the next subject of the Warhammer Communities previews.
via Warhammer Community
You can see the entire article by following the link below
https://www.warhammer-community.com/2017/08/05/legion-focus-word-bearers-aug-5gw-homepage-post-2/
Legion Tactic
Re-rolling failed Morale tests is great for Chaos Space Marines – the army favours large squads of elite troops, and this ability means that valuable multi-Wound models like Possessed and Chaos Terminators are unlikely to flee at an inopportune moment. This synergizes well with the Dark Apostle, who – thanks to Demagogue – gives nearby units a massive 9 Leadership.
How to use them
The best way to play a Word Bearers army is going to be fielding loads of Cultists, backed up by powerful support characters. This is the anvil of your army. For the hammer, some Warp Talons backed up by some summoned Daemons can be deployed further up the field where they’ll do the most damage. Worried about summoning not being reliable enough? With Dark Pact, you’ll be able to re-roll your summoning roll and avoid losing a beloved Lord at a key moment, as well as making full use of more difficult summons, like a Bloodthirster.
The new Chaos Space Marines codex doesn’t just contain the Heretic Astartes, and there are rules for the four most common types of Daemon, too – Bloodletters, Daemonettes, Plaguebearers and Horrors. If you’re looking to summon these in your games, you’ll only need one codex, reducing the amount of in-game bookkeeping you’ll have to do.