Bates, Swan and Anderson pit Superman against Popeye in Action 421 (Feb. 73), although they alter him slightly in creating Captain Strong.
Captain Strong is first seen by Billy Anders, a young boy who has been involved in a number of Superman’s adventures in his own book. He tells Clark Kent about the man.
The Captain has discovered the bed of a rare plant, sancha, which endows him with super-strength, like Popeye’s spinach. A corporation wants the location of the sancha, and send out a Superman impersonator to try to get the information from him, but he sees through the ruse.
This complicates matters when Superman shows up, and winds up in a mid-air fight with the angered sailor. Eventually Captain Strong calms down, and together they get rid of the corporate shills. Superman discovers that the sancha is really an alien plant life, and gets rid of it.
That could easily have been the end of Captain Strong, but the character proved popular enough to return.
Green Arrow joins the rotating back-ups, with a story by Elliot S Maggin, Sal Amendola and Dick Giordano. This marks Green Arrow’s first solo series since he joined Green Lantern in the pages of his book. There was a Green Lantern/Green Arrow adventure as a back-up in the Flash, following Green Lantern’s cancellation. Green Lantern remained as the back-up feature in the Flash, as Green Arrow moved over here.
It’s not entirely a solo series, as Dinah Lance is a major player. Later in the run, she would be in her Black Canary garb, but in this one she is trying to get her flower shop off the ground. Oliver Queen decides that he would make a great public relations person, and makes Dinah’s shop his first client.
He finds a wanted criminal, and herds him towards the flower shop, and contacts the media, to ensure there are photographers when he captures the man in front of the store.
And though he fought crime, and promoted the shop, all he really cares about is how he looked in the newspaper photo.
Yup, that’s Green Arrow.