The writer is full of absolute shit when it comes to The Spectre, who did reach his full potential in the Ostrander/Mandrake series of the 90s. He also declines to mention Blue Beetle was a hero at 4 different publishing houses since the Golden Age. He also never mentioned the great Moon-Knight stories drawn by Sienkiewicz for Hulk magazine. His criteria for potential is solely based on sales. The Spectre managed a 62 issue run and having Hal Jordan become him was not a good idea, and not one Ostrander would have approved.
Response to The Official Betty White Aging Timeline:
The “1978” photo is the wrong year. The show was off the air by then.