via The Father Mapple (a reader of Faeit 212 and an attorney)
Just some speculation about publicly filed records.
I was doing some research on the United States Trademark website, and found that in September 2013, GW filed for the "BATTLEFLEET GOTHIC" "MORDHEIM" "NECROMUNDA" "DREADLEET" trademarks. These are being actively pursued, with some documents being filed as recently as last week, in September 2014, with correspondence going back and forth.
Also, these are pre-applications, where they anticipate releasing products in the future and want to be protected until market, not for products that they already have in the market.
In addition, the categories of goods they cover include miniature games, RPGs, computer games, and anything in between those categories and board/card games.
Dreadfleet is actually gotten through to be posted for opposition, which means the public can comment and challenge it, but the USPTO doesn't have a problem with it.
To serve as a counter-example, some of the Blood Bowl trademarks date back from the 1990's and the 2000's, and are considered to still be in use in various ways. And 1 Space Hulk trademark from 1997 for board and computer games is still active and being used, but newer Space Hulk ones for various other types of games are being filed in September 2013 with the others mentioned above.
The really funny thing to me is that they killed off the Specialist games around May 2013... but then in September of the same year paid an attorney lots of money to file for all the other trademarks again. So, in my unprofessional market analysis, this is not a "We used these in the past, lets get the IP rights" type of thing, but a "We got stuff coming down the pipe later, and now we are doing the IP rights correctly this time before hand!"