From the press release:
HULK & RED HULK SMASH HOLIDAY SEASON!
Marvel is proud to unveil both interconnecting Hulk Santa Variant covers from superstar artist Ed McGuinness, exclusively on Hulk #18 and Fall of The Hulks Gamma!
Retailers, please see this week’s Marvel Mailer for a special holiday offer regarding both Hulk Santa Variant covers.
HULK #18 (OCT090512)
HULK [...]