To me, it goes like this. The t-shirts always had a direct implication to the powers/appearance/name of the job they were representing. Therefore, as much as I want Samurai to be the case, it is sadly hard to accept the director(Sam Raimi) to be the true hint.

With the above being said, I think of clues related to the Spiderman image. Strangely enogh, Puppetmaster is the only job that decently resembles Spiderman: Melee fighter with strings that will also have pet-puppets.

Hence, unless there is a formal rejection of Puppetmaster, I cannot see how it won't be the case if we consider the t-shirt to actually imply a new job.

Thoughts?