we'll try, but no promises
Michigan's got that return date with UConn in 2013 scheduled so there were never going to be any cool surprises when it came to Michigan's two TBA opponents that year. But they must be scheduled. According to Ohio.com, the first has been revealed: Akron on September 14th.
At the moment Akron Buckeyes are terrible. They lost to the Akron State Golden Bobcats, an instate rival, 42-0 and followed that up by losing to Temple, which is Temple, 41-3. Last year they were 1-11. They've got two years to stop being just unwatchably horrible, but at best they'll be a middling MAC team by then.
You may carry on not really caring about the details of the 2013 schedule.