Awesome to see this excitement!
Here's the official word from Hasbro:
Under the Artist Agreement, the artist is allowed "to display a 2D image, or 3D render (the "Images") of your Design on your own website, blog, etc. in order to promote the availability on SFA your Design and Products." I consulted with Deb, and we think this allows the artist to display an image of their product with a brief, factual description of it.
So "Mini Scrabble Board for SuperFanArt" would be fine, but "official Hasbro" would not. As a general matter, I would prohibit them from using "official," "exclusive" and "genuine," as well as terms that are more sell-oriented, like "limited time" or "limited quantity."
Let us know if you have any other questions!