Doctor Clever....Gentleman Ghost (okay, not a bad choice, but he isn't on the Nick Cardy cover!)....Doctor Glisten....Captain Cold (good one there!)....and Mister Who!
Still, here there are!
The Adventure Of The Human Streak
Johnny Quick's foe, Dr. Clever, fakes his own hanging in prison to get free, and continue his war with his foe. Dr. Clever has a new trick up his sleeve, a ray that gives whomever he shines it upon super-speed, and uses it on his henchman, Breezy.
Dr. Clever had faced Johnny before in More Fun Comics #74, and would return in More Fun Comics #78 and #89, while Johnny Quick would eventually go on to Adventure Comics (with many of these tales reprinted, and later, be a focus of the retroactive comic, the All-Star Squadron).
The Crimes That Couldn't Have Happened
Gentleman Ghost returns (his first appearance reprinted in Secret Origins #1), this time having taking the loot from a locked bank vault. Hawkman and Hawkgirl spring into action, finding out he had taken the jewels before it was placed into the vault.
Gentleman Ghost would return, to face not only the Golden Age Hawkman, but the Silver Age Hawkman as well, revealing that he really was the ghost of Gentleman Jim Craddock!
This was the only appearance of Dr. Glisten, but Hourman had many adventures in Adventure Comics with quite a few of them being reprinted.
The Big Freeze
Leonard Snart was up for parole, with Iris West taking Barry Allen there so she could testify.
Captain Cold had faced Barry before during his original Showcase run (reprinted in Treasury form), and would repeatedly return to face the Flash!
Dr. Fate shows up to stop hoods from robbing a museum, but their boss, Mr. Who, gets the painting he wanted and escapes.
Mr. Who would return a few more times in More Fun Comics (only reprinted in the Doctor Fate Archives), and even later, as a member of the Monster Society of Evil (facing Hawkgirl, Hourman, Dr. Fate and Sandy) introduced during the Crisis during World War II (and tying in with the next issue of Wanted).
Batman, Flash and Golden Age stories (though no Golden Age Flash) with one more issue left (though the letter pages didn't foreshadow this). Hope was still there, with possible promises of new stories, and perhaps an all female issue of Wanted, with Catwoman, Poison Ivy, Cheetah or the Huntress!