Thunt, the solution is far more easy than you might imagine. So many comics, games, films, whatever did include allusions to famous names/games/whatever, and the often did only change minor parts of the word.Yuan-ti, Maglubiyet, Dungeon Master... even Player's Handbook (and more). It's all got to be taken out of the comic.
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For example you could call the race
Juantee instead of Yuan-ti. Still spells the same in english if I am correct.
Or Overlord instead of Dungeon Master.
I can't see that Player's Handbook is a copyright protected word. Even if it is, how about adventurer's handbook? Or come up with something like "Player Character guide".
You don't have to take it out, just replace it with something close enough.

Just think about lord helmet (or whatever is his name in space balls). The names are differnt, still people look very similar and everybody knows who should be who compared to star wars.