My company sells at a lot of comic book and anime conventions and they are very strict about copyright and intellectual property right infringements. The convention staff will usually have lawyers or experts on hand and if they believe that your products infringe a copyright they will boot you from the convention without even blinking.
Most of the major conventions have been sued by major entertainment companies due to bootleg products and reproduced copy righte material.So,I would reccomend not reprodicing or getting licensed by said company in order to produce.
Hope this helps,
Barry