I had missed this before but it looks like the Blight Hauler is getting a solid upgrade. That is of course if the data-sheet is correct when we finally get to see the codex. We will be seeing this codex coming very soon. (Ive heard its coming next week to pre-orders)
These are making the rounds and were sent in.
The Defiler was listed earlier on Warcom. Chaos looks like it may be in store for some solid upgrades.