The Magic of Shazam!: Mr. Scarlet
I'm still trying to get a handle on Mr. Scarlet. What is his function in Fawcett City? Detective? Gritty avenger? Comic relief? No, that's Uncle Dudley's, Mr. Tawny's, and Robot Marvel's job. Right now, I'm leaving toward Mr. Scarlet and Cardinal as detectives, since the Marvel Family don't do too much sleuthing, but the trick is to make sure Mr. Scarlet and Cardinal aren't just cheap retreads of Batman and Robin. (One of the few positives to come out of DC's "One Year Later" stunt is the seeming restoration of Batman and Robin as the Dynamic Duo.) But, character schmaracter, the truly important thing is that I already have a bunch of Mr. Scarlet titles ready to use:

"A Study in Scarlet"
"The Scarlet Letter"
"The Scarlet Pimpernal"
"The Vermillion Millions"
"Masque of the Red Death"
"The Red-Headed League"
"Crimson Tide"
"Paint the Town Red"
"The Red Menace"
"Cardinal Virtues"
"Red Handed"
"Seeing Red"
"Red Rover"
"Rose Red"
"Eric the Red"
and if I get truly desperate:
"The Scarlet and Gray" (Booooo! OSU sucks!)

"The Red and the Black" has alredy been reserved for a story pitting Captain Marvel (whose costume is primarily red) against Black Adam and the his Monster Society of Evil, but it might also serve as an apropos time to introduce Mr. Scarlet and Cardinal.

Superman/Action Comics
As it presently stands, here is the complete list of "super" titles, in no particular order:

"Superego"
"Supertown"
"Supernova"
"Superstition"
"Supercollider"
"Supercilious"
"Supersonic"
"Superconductor"
"Superstar"
"Superlative"
"Superficial"
"Supernatural"
"Superstructure"
"Superb"
"Superior"
"Superimpose"
"Supernal"
"Supervision"
"Superfluous"
"Supercharger"
"Super-Cycle"
"Superpower"
"Superhuman"

The one none super title I really want to use is "Lex Talionis," Latin for "the law of retaliation." This would of course be my Lex Luthor magnum opus, though I haven't a clue as to what the story would actually be about.