Lois Lane, Superman, Batman & Diana “Wonder Woman” Prince, in a Murphy Anderson illustration for Coronet magazine “circa late 1960s”. (As published in 2003’s The Life & Art Of Murphy Anderson, by Anderson & R. C. Harvey.)
Detail of the A3 poster of Batman by Frank Miller and Dan Adkins which appeared in 1979’s Mediascene #40. The same year would see Miller’s first shot at a Batman story, illustrating the Denny O’Neil-written “Wanted: Dead Or Alive - Santa Claus”.
I suspect the passing of the decades will mean the joke needs a touch of explaining. Around 1980, Moon Knight was being heralded by many Marvel fans as “Batman done right”. At the same time, its artist Bill Sienkiewicz was - shall we agree to say? - channeling the style of Dark Knight uber-artist Neal Adams. With Sienkiewicz having playfully commented on this in his cover to the March 1980 edition of The Comics Journal, Adams responded three months later with the back cover to TCJ #56;
In the light of that, the line at the top of the Sienkiewicz-illustrated cover to the following year’s Amazing Heroes #6 always seemed to me to be a little …. mischievous;