Pepsi Max may be the official soft drink of the NFL, but rival Coke Zero is moving into its space one territory at a time, following up the recent signing of former Pittsburgh Steelers great Jerome Bettis by inking Chicago Bears all-pro Brian Urlacher, who will join fellow Windy City stars Derrick Rose and Patrick Sharp in a marketing campaign. Separately, Diet Coke is preparing a campaign to support the next James Bond venture, “Skyfall,” due out in November.