Activist investor Blackwells Capital has a solution for Walt Disney Co. and its chief executive Bob Iger to rev up sales: Split the company into three separate focused entities — sports, entertainment, and resorts. “Disney may simply be too complex for any one successor to Mr. Iger to manage holistically, and Blackwells believes that it is the responsibility of the Board to oversee these types of analyses in the ordinary course,” the investment firm said Tuesday in a proxy statement for Disney’s DIS, +1. ...