A lot has been revealed during the first day of Warhammer Fest. This list of what is in Imperial Armour 13 has been reported as very accurate regarding what is in the new book, and there is a lot more information where that comes from. Of course I can just give a quick overview and you can go look at the details of what is being reported. Lets take a look at what is in the book, and if you want to know more you can follow the link.
via Mr Mystery on the Bols Lounge
http://www.lounge.belloflostsouls.net/showthread.php?49798-Imperial-Armour-13
Chaos Astartes Battle Tanks
Chaos Predator Battle Tank
Chaos Infernal Relic Battle Tank (all the Heresy versions. Autocannon on that is AP3...)
Chaos Vindicator Siege Tank
Chaos Relican Sicaran Battle Tank
Chaos Astartes Assault Vehicles
Chaos Land Raider
Chaos Land Raider Proteus
Chaos Infernal Relic Land Raider Achilles (oh, and for every HP knocked off that? Bigdakkafourboom gains +1S, lowers the AP by 1 (unit entry oddly worded, but example given on Pp195), and adds -1 to enemy Pinning Tests, on top of it's base -1 for Shellshock. Example mentioned? 2 HP lost makes it S7, AP3, Pinning tests at -3...
Chaos Rhino Armoured Troop Carrier
Chaos Astartes Heavy Tanks
Chaos Fellblade Super-heavy Tank
Chaos Typhon Heavy Siege Tank
Chaos Spartan Assault Tank
Chaos Astartes Attack Craft
Chaos Fire Raptor Gunship
Chaos Thunderhawk Gunsip
Chaos Hellblade (Autocannon can be upgraded to Heavy 3, Rending which I think is new? Oh, and at the start of play, you can nominate a Flyer or Flying Monstrous Creature or Gargantuan Flappy Nasty, including those in reserve. When making AP rolls or To Wound against the chosen model, 1's can be re-rolled. Which is pretty *****ing if you ask me)
Chaos Hell Talon (Again, Autocannon can be souped up)
Chaos Dreadclaw Drop Pod (does what it does. Has Assault Vehicle, and Frag Launchers. And does burninating when zipping about)
Chaos Kharybdis Assault Cloaw (biggerer version of the Dreadclaw)
Chaos Dreadnoughts & Helbrutes
Ferrum Infernus Chaos Dreadnought (Daemon Prince waiting to happen, for 25 points)
Emperor's Children Sonic Dreadnought (Warp Amp doubles the shots of it's Sonic weapons if it remains stationary in a turn, and can give all sonic weapons Rending at the price of Gets Hot!)
Chaos Contemptor Dreadnought
Daemon Engines
The Machine Daemonica (fluff stuff, but reading through the contents as printed to avoid missing gubbins off)
Greater Brass Scorpion of Khorne
Blood Slaughterer of Khorne
Chaos Rapier Weapons Carrier
Chaos Decimator
Blight Drones
Plague Hulk of Nurgle
Chaos Titans
Chaos Reaver Battle Titan
Chaos Warhound Titan
Renegades and Heretics
Full army list and that.
Appendices
Appendix I - Legacies of Ruin ( I assume the Rites of War equivalent, but see below *)
Appendix II - Special Rules
- Vehicle Summary
- Weapons Summary
Appendix III: Lords of the Abyss (honking geet Daemons