To preface, I do not have legal experience, so I'm not sure if this is actually a problem or not, but because people are talking about legal matters of intellectual property, there's something I think I might mention as well. There might be some questionable dialogue in the "Carnage on the Fields" adventure.
It was just a small thing really, but the ogre in "Carnage on the Fields" says "Loktar" and "Dabu" at some point. The reason this might be concerning, is these words are from the Orcish language of World of Warcraft. The use doesn't seem to be a parody, so if this counts as intellectual property of Blizzard Entertainment there could be a problem. Emphasis on "could" because once again, I don't really know.