The lawsuit by Games Workshop against Chapterhouse Studios and Paulson Games has been news for over a year now. For those of you who are new to this news, Games Workshop sued Chapterhouse Studios, and Jon Paulson. No one seems to know why they sued Jon Paulson since he didn't have anything to do with Chapterhouse, though he did do resin casting. GW claims that both Chapterhouse and Paulson Games violated GW copyrights.
You can download the original legal filing by Games Workshop here.
Unfortunately my original comments were cut and pasted from DakkaDakka and spread like wildfire, and in many cases I was misquoted.
Essentially I was told over a year ago, by a very, very reliable source (who shall remain unnamed) that certain kits were being held back by GW as there were concerns regarding the Chapterhouse lawsuit.
GW had been advised that because they had not released physical representations of Thunderwolves, Tervigon, Tyrannofex, Doom etc that third parties who already had could contest ownership.
GW have never released a Thunderwolf model, they have released Canis Wolfborn, and as such own the rights to a model caleed Canis Wolfborn, but had not yet released Thunderwolves.
There was a fear that releasing these models after other third party manufacturers (not just CHS) would weaken their case against Chapterhouse.
The most contentious of these models being the Doom of Malantai, Tervigon and Thunderwolves.
However it is no coincidence that several months ago GW hired a new IP lawyer, who now advises them on exactly these kind of issues, and it is obvious that their legal advisors have said it's ok to release these models.
It's not a coincidence that Thunderwolves and the Tervigon have been released simultaneously just before the case against Chapterhouse goes to trial.
So there is a summary of where we are at he moment. I will continue to keep my ear to the ground and have contacted both Nick at Chapterhouse and Jon Paulson for comments if they care, though Nick of course, doesn't want to say too much for now.