"Ok so here is a bunch of info I managed to come by from secure sources:
CSM Doctrine:
Exact same thing as SM, except replace +1AP with exploding 6s (unmodified hits)
Icons:
Vengeance: +1 Combat Attrition
Wrath: +1AP melee
Flame: +1AP shooting
Excess: +1 to hit in melee
Despair: 6s to hit automatically wound
All legions are getting 6 warlord traits, 8 relics, and 8 stratagems
Legion traits: (Supposedly apply to all units)
Nightlords:
-2LD & -1CA @ 9''
+1 to advance & +1 to charge
+1 to wound when using a pistol/assault/melee against a unit that is below half strength or below LD 6
Iron Warriors:
Ignores cover
Reduce AP1/2 by 1
+1 to wound using heavy/grenade against vehicles/buildings/units in cover
Word Bearers:
Charges/Heroic Intervention = reroll hits
5+++ vs MW
When using a pistol/assault/melee, 6s to wound cause 1MW (capped @ 3MW per unit)
Black Legion:
Ignore Combat Attrition
+1 to hit after charging or shooting closest unit
Rapid fire/assault/pistol cause exploding 5s to hit
Emperor's Children (4chain leak, not from my sources)
in the book
have a way of consistently hitting on 2s (even with thunder hammers)
World Eaters
Not in the codex
Datasheet info:
Chosen
3w
can use Thunder Hammer
Mutilators
no longer in the book
Warp Talons
2w
lost cancel overwatch
gained no fallback
5a (these are total with claws)
Raptors
still have the -1LD aura
+2a
Obliterators
can shoot units that are in engagement range with them (like wraithguard)
in melee they have powerfists without the -1 to hit
3 different shooting profiles
Havocs
exactly the same as right now but 2w
Stratagems
something to ignore invuls (4chan leak, so take with a grain of salt, leak said EC chosen could destory custodes hitting with TH on a 2+ and with strat ignore invul saves)
NL deepstrike strat for jump packs, DS turn 1
NL vox scream disables AURAS
Other:
IW ectoplasma forgefiend can hit on 2+ and does flat 4 damage
New cultist unit HQ
New mutant cultists
No hateful assault, +1 attack to profile for all "