Please take with a little salt, as we have not seen anything else for this yet.
via The Decapitator
So not sure when it's due for release, possibly in the upcoming Imperial Armour book, but Forge World are releasing an amazing looking new 40K Chaos model.
On the surface of it, it looks like a possible Chaos Contemptor, only bigger and stockier, think Dreadknight sized. It's hard to describe but it looks mean! It's also not actually a Dreadnought of sorts, it's actually a Chaos Daemon Engine!
It's called a 'Decimator', although I believe there is another version planned called a 'Dessicator'. Not sure if this is a separate entry depending on weapon loadouts however, or another unit with a slightly different statline and USR's.
There are 5 weapon arms currently planned, the basic loadout being 2 x CCW's. I believe there is another CCW option (a type of chainfist thing) and 3 gun options as it stands. Don't remember the name of one of them but I know one is called a 'Butcher Cannon' and the other is a 'Chaos Conversion Beamer' probably with it's own funky name!
Sorry I can't bring you any more news than that, but when you see it you'll realise why I think it's so damn cool!