Being born in the late seventies and growing up in the 80's, vintage tshirts were not around yet, (now I am really showing my age)
It has only over the past few years that vintage style tshirts have hit the popularity stand.
Anything from cars to planes, from tv games to tv shows, to rock bands to pop groups, from sports to entertainment, almost anything and everything was classified as cool.
So if vintage is cool, then bring back that 'coolness' with:
Today we have taken from the past and made a new style of design, a vintage style.
A lot of old tv programs, sitcoms and tv games like pac man, are making a come back, by relaunching them to the new generation with more spunk and special effects.
Remember the ultra cool programs like the A-team, Knight Rider and Batman. These were the hip shows to watch during the 80's, and these are just some of the shows that are classified as 'vintage shows' with their characters and logos printed onto funky 80's tees.
Your idea can be a funny saying from a movie or cartoon that everyone (well almost everyone) laughed at, or even a strange sitcom character that you liked.
Always keep a look out for more popular ideas that you can use when designing vintage tshirts.