"From a Cub to a Wolf" continued from Superman (Vol 1) #680 and continues in Superman: New Krypton Special #1. Also ties into Adventure Comics Special Featuring the Guardian #1.
*Jimmy Olsen, would-be star reporter, doggedly investigates the mystery surrounding Superman's newest foe, Atlas! But the secrets behind the titan of yore lead Olsen across the country and into great danger as he must survive attacks by none other than Codename: Assassin! And just as Jimmy is getting to the truth, he finds himself in the Midwest and seeking the aide of a hero long thought dead. *Source: dccomics.com