Aaron Sorkin is revealing the reason why Jesse Eisenberg declined to reprise his role as Mark Zuckerberg in The Social Reckoning . During a recent interview with Vanity Fair , Sorkin — who penned the 2010 Oscar-winning film The Social Network and wrote and directed the upcoming sequel — shared that he spent three days trying to convince Eisenberg to return for the follow-up pic. “I felt like it belonged to him, and he was certainly battle-tested,” he said. The A Real Pain actor-director earned an Oscar nomination for best lead actor for his portrayal of the Facebook founder in The Social Network . However, the actor couldn’t be persuaded. “He simply did not want to be conflated with Mark Zuckerberg anymore, that he has his problems with the guy,” Sorkin explained.…