Stored along with my Justice League International Postcards was this Super Powers birthday card, (c) 1987. It was produced by Portal. If I remember correctly, I found it on a spin rack in a Pier One Imports store, almost 20 years ago. The inside simply says "Have a Happy Birthday from All of Us!" On the back it reads "Even Superman cannot stand alone against the forces of evil. That is why he is part of the Super Powers team, a group of heroes formed to defend the people of earth from harm. Among his teammates are Batman, the Flash, Wonder Woman and Green Lantern."
Implied, I think, is "Hey, you can't expect us to know who all these people are, we're a freaking greeting card company for chrissakes. You should be impressed we came up with Green Lantern."
Correct me if I'm wrong, but doesn't "Super Powers" in this context refer to a line of DC Superhero action figures from that period? Those were my college days, and the memories are blurry.