Couldn't you simply change the name?
And more: If you are not getting money from your work, what can they claim against you?
Example: All the Mods using 'Warhammer' and 'Warhammer 40k' logo are in the same condition, in fact the logo belongs to Games Workshop (that is a shark when someone tries to touch their copyright rights!) but nothing happened to them! Also 'Third Age' or 'Lord of the Rings' are under copyright but nothing happened to those using them without getting money.
Anyway good work, in the hope all this idiotic accident ends soon!