This awesome Doctor Who t-shirt art features the latest regeneration from Matt Smith's 11th Doctor to Peter Capaldi’s 12th Doctor. It's presented in a fun comic book form called Time Lord Comics. The design comes from Creative Outpouring, and it's available on Red Bubble.
If the art looks familiar, that's because there is similar set-up that was done years ago when Batman introduced Robin. I included that cover for comparison below.