No company has ever rebranded for reasons related to marketing or increasing the image of the brand, nope, its always becauce the brand is tanking, never mind that they're replacing a frankly innacurate name ("Games" doesn't really mean what it did 30 years ago) and a logo from the 80s that, while I love it, is really showing its age in todays highstreet, where design is now more about clean lines and simple fonts.
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Also, Chapter House didn't "win", you don't decide legal cases based on how many judgements went their way numerically.
The decisions fudementally destroyed CHs business, they're no longer allowed to use GW terms to sell their products and they're not allowed to make versions of GW models like the Tau walker, Kroxigor and the eldar models they made.
The fact that they're able to sell their shoulder pads isn't that impressive a victory really.