The OTC promised that he would be sticking around for the summer after he won the World Heavyweight Championship from CM Punk at WrestleMania 42, but he apparently wasn't talking about the entire summer. Roman Reigns is set to defend his title against his real-life cousin, Jacob Fatu, this Saturday night at WWE Backlash . It will be his first defense since the 'Showcase of the Immortals', and with multiple major events on the calendar for the month of May, this very likely will not be his last. While Reigns is currently the heavy betting favorite to retain at Backlash, company advertising for the month of June has members of the WWE Universe questioning the status of their Tribal Chief. WWE is no longer promoting The OTC for any shows beyond the May 25 edition of WWE Raw at the Schottenstein Center in Columbus, Ohio.…