Collectibles Misc Read Time : 5 Minutes Another Year, Another Marvel and 7-11 Cross Promotion April 3, 2009 YBMW Staff 1 “Accompanying the superhero Slurpee cups featuring action-packed graphics of Wolverine, Sabretooth and Gambit is a new, remarkable Slurpee flavor – Mutant Berry.” Mmm, Mutant Berry!