Shazam/YMMV

Complete Monster: Captain Nazi. C'mon, his name is Captain Nazi! What do you expect, puppies and rainbows?
- Sobek, who spent months befriending Osiris only to lure him into a false sense of security and eat him
Dork Age: Black Mary, both the character and her involvement in Countdown to Final Crisis..
Ensemble Darkhorse: Black Adam, who has easily eclipsed the Big Red Cheese in popularity thanks to Geoff Johns's use of him in JSA and his later appearances in 52.
- Credit for this should also go to Gerry Ordway, who revamped Adam from a fairly generic evil twin type villain into an a-list threat and a terrific evil counterpoint to Captain Marvel's wholesomeness.
- Cap Junior was this back in the Golden Age.
The Scrappy: Osiris was deliberately built up as this in 52 to build up to an Alas, Poor Scrappy moment.
Seinfeld Is Unfunny: Many trends that are commonplace in comics today, like a female counterpart and continuity between issues (including continuous stories) were popularized by Captain Marvel way back when.
Spotlight-Stealing Squad: Some fans see Black Adam and his family as this, since they've gotten an overwhelmingly larger amount of attention in recent years.
Shipping: Many fans want to see Billy hook back up with Stargirl, even badgering the new writers of the book about it. It ain't happening, since they're now handled by two different editorial teams.