A new animated show featuring Wally the Green Monster is coming to NESN. “Wally’s Opening Day” will premiere Sunday, April 2 on NESN at 5 p.m. ET. The 30-minute show, which is presented by ’47 Brand with the support of XFINITY On Demand and New England Ford Dealers, is part of the Red Sox’s “Calling All Kids” initiative, and it will air the night before Boston opens its 2017 season. According to a Red Sox press release, the show is centered around Wally missing the ride from spring training back to Fenway Park. Wally then has to rely on help from those around him to make sure the April tradition goes on, freak spring