Sometimes it's not about having the law on your side.
What is your ultimate objective here?
To be able to continue to profit from another companies IP? To make money off the back of other peoples ideas and hard work? To break apart the protection of GW's IP... to allow any party to create their own "ideas" and "variations" on existing products?
Where will it... where will you stop?
Do you wish to canabalise GW sales and customers for your own profit using THEIR IP rather than thinking for yourself and creating something new, like other companies have done?