Good morning everybody. I come bearing gifts from the Dark Gods. Praise be!

Marauders: 30mm bases, no more marks. Foot marauders get light armor built in and horsemen get shields but lose skirmish.
The new tribal aspects replace marks. They get once per game effects, mostly stat buffs.
There's new mutations for units. Most units can pick one, a few can pick two and they can be duplicated.
There's some minor restrictions to who can take what, but otherwise they're mostly "choose any you want". They are useful buffs like conditional stat buffs, MR, or other miscellaneous bonuses. They're pretty juicy.
There's a new spell lore as well. Fairly solid from what I have heard, but has a couple of oddities in it.
The new magic items have some interesting ones, but nothing groundbreaking.
No mammoth, no new dragon, and the only new profiles are the updates to the RH marauders.
Release date imminent.