The 'Everything Sux' t-shirts come courtesy of Emma Harckham, who designed the shirt to be sold over on RedBubble. Even though the t-shirt doesn't feature any Bryan Lee O'Malley artwork, true Scott Pilgrim devotees will instantaneously recognize the reference as soon as they see it.
Implications - Consumers have an affinity for pop culture products because the allusions used in the products invoke empathy from consumers. Consumers feel they can trust companies that share similar interests to themselves. As such, corporations may consider using pop culture catchphrases as design elements in their wares in order to entice consumer business.