Barbie and Oppenheimer’s box-office fates have been enmeshed until the movies have reached portmanteau status, jointly christened “Barbenheimer” as if People Magazine caught the physicist and the foot-tall plastic doll canoodling together on a Malibu beach. The films’ shared release date inextricably linked the narratives of their success or failure, and a hybridized fandom evolved from viral memes to custom T-shirts and mass ticket sales for back-to-back viewing of the two movies.