Just recently stumbled across this amazing homage to the classic Justice League of America cover by Mike Sekowsky and Murphy Anderson. The Watchmen are a fabulous creation, but I'm glad their inspirations, the Action Heroes created largely during the tenure of Charlton editor Dick Giordano are given their due by artist Nick Perks.
Here's the original in all its Silver Age glory. If you're interested I took an extensive look at the DC Crisis comics several years ago here at this very blog. Check it out.