At stake here is the ideological conflict between the open society and its enemies (in this case, corporate capitalism.) As for concrete legal threats - hard to say. Thievery went near some of the same problems, and we never heard anything from Eidos. We heard privately from certain members of ISA who had played Thievery and thought it good, so an interesting thing is that you can count on worker solidarity. However in Thievery we didn't go near certain plot type things like hammers and specific world symbols to be on the safe side. But of course - we had slightly different aims. Nightblade has even more different aims and aesthetics, for definite intellectual and practical reasons. But - think of it - if I was JRR Tolkien's estate and obsessed with "intellectual property", I'd be might pissed at all the fantasy/ad+d stuff that's been floating around for the last few decades.