User blog comment:Troy95/Concept Art/@comment-26200925-20150326115025

I am personally not sure if that would fall under "fair use" any more.

I have had this discussion with Tueman before; my illustratitive example was the following: You are allowed to quote from a book in order to illustrate what you are saying, but you are not allowed to copy the entire book and offer it for free.

There is a reason why bigger Wikis - such as Wookieepedia or the Assassin's Creed Wiki - do not have concept art pages. What we could do is to add a category page, like Wookieepedia has done. Then, all we need to do is assign concept art pictures to this category, however you do this.