According to an AP article on Yahoo! Sports, Indians general manager will be promoted to team president after the season and be succeeded as GM by his assistant, Chris Antonetti.
Cleveland won the AL Central in 2007 and came within one victory of reaching the World Series in 2007, their best finish under Shapiro. A son of prominent agent Ron Shapiro, he was selected major league executive of the year by The Sporting News in 2005 and 2007.
As mentioned in my "Meeting Mark Shapiro" posting, the Tribe's head MOT is a generous in-person signer.