Pretty sure the announcement was to test-drive the idea of a live action Barbie movie with the public. The FA Barbie story made sure every pandering website picked it up. The public was interested in the idea and horrified by the casting, giving Sony clear direction. Now they can go back to a Margot Robbie Barbie movie. Heck, they would even kill with Reese Witherspoon playing an older Barbie.  And a C-lister like Schumer has zero scheduling conflicts with a $100 milllion, summer tent-pole movie.