Check out the Pic above.
It may indeed be the Contemptor I have seen in the pics at Games Day UK, but the word I keep hearing is that the one at Games Day was a conversion, although at first glance they appear to be the same model.
Updated news from Games Day UK on this subject
Was told by FW designers that the Chaos Contemptor is 3-4 months away! A generic version will be released first, then legion/God specific versions later!
Regardless, it looks like we are going to see a Chaos Contemptor Dreadnaught soon.