During an investor's call EA CEO Andrew Wilson announced that the company expects Star Wars Battlefront to sell over 13 million copies during fiscal year 2016, which means from launch on November 19 through to March 31 2016.
This estimation is up from another investor's meeting six months ago, where the company expected to sell 9-10 million copies during the same window. This may have something to do with the success of the beta, which had over nine million players participating.