More info - http://uk.ign.com/articles/2018/09/04/sony-is-blocking-cross-play-because-playstation-is-the-best-place-to-playA Sony executive has seemingly poured cold water on the idea of an upcoming cross-play solution.
According to The Independent, Sony CEO Kenichiro Yoshida said during Germany's IFA electronics convention, "On cross-platform, our way of thinking is always that PlayStation is the best place to play. Fortnite, I believe, partnered with PlayStation 4 is the best experience for users, that's our belief."