Sony Pictures has rethought its approach to the October 28 opening of the Roland Emmerich-directed Anonymous, which originally was planned as a wide release. Instead, the studio is taking a platform approach and debuting in 250 theaters the drama that suggests William Shakespeare didn’t write all those plays — it was really a British earl.  Concerned that a soft opening as a wide release would doom what one exec described as “a magnificent film,” the powers that be decided the movie should open only in major cities, hopefully building buzz and momentum in a gradual rollout to more theaters throughout November.