So far I like LJ's suggestion for the back as the best. Even the "ten whole years already!" with 10 bullet holes sounds good. Any chance to use the Coyote symbol is a good thing. It's the most unique original symbol Joe Canuck made and I honestly mean that.
Besides, the Coyote symbol could work on a T-shirt colour other then black or white. It would work on green or brown, giving some variety in people's wardrobes.
The original Joe Canuck that Loop made the head for is unique as are the Coyote and Joe Canuck logo's. The Maple Leaf with Cobra symbol is cool, but it's not an original Joe Canuck creation.
I'm not a big fan of basing it around Black Ice or the HATE tank. Those were cool and all but just don't have that special, Canadian original look to me. Both are excellent items but at the end of the day are just super cool customs. Still, if that is a direction that many are in favor of, then I could get behind LJ's idea of the guys jumping around the HATE tank like the original Issue 1 of the marvel comic. It would be really cool if we could get a joint art project from Robert Atkins and Loop.