Epic Justice League T-Shirt

That right there ranks pretty highly among the coolest T-Shirts EVAR. Nothing against your Batman shirts, your Superman shirts - Rao knows I've got my share. But right here is indie cred personified: Dr. Fate, Green Arrow, Firestorm, Martian Manhunter and Red Tornado.

Second-tier heroes FTW!

Except for Vibe, about whom the less said, the better.

You may have seen this shirt on The Big Bang Theory, it's one of the many cool comic shirts worn by Sheldon Cooper (Season 1, Episode 16, and Season 3, Episode 23). 

You can get get yours here.