Looking great, I am considering buying one. Is there any licensing issues involved with selling shirts like these?
Not at the moment, it's essentially treated as fan art. Kinda how things go at conventions, there are a number of unlicensed prints and attire pieces sold at conventions and online, and license holders know that while they could legally go after people for selling them, as long as the sales are limited, it's better to stay in the good graces of the community.
There are loads of unlicensed designs on Teepublic, so we didn't see any issue. We do have a good relationship with 20th Century Studios, and if they ask us to stop selling the shirts, we would, but I don't foresee that happening.