Sony is finally allowing 'Fortnite' PS4 cross-play with Xbox One and Switch

Xbox Head Phil Spencer and Nintendo President Comment on Sony's PS4 Fortnite Crossplay Stance

Step-By-Step: How To Do Cross-Play With iOS, Xbox One, PS4 And PC In ' Fortnite Battle Royale

Fortnite gets PS4-Xbox One crossplay due to configuration issue

Fortnite' Creator Epic Games Launching Cross-Play Services

On Fortnite Xbox you can't play Fortnite without Xbox Live Gold now I can't play with my Xbox friend (I'm on PS4) P.S The photo is from a video : r/FortNiteBR

Fortnite' Split-Screen Guide: How to Use on PS4 & Xbox

Update) Apparently you can play Fortnite together on PS4 and Xbox One – Destructoid

Epic Games briefly enabled cross-play on Fortnite between PlayStation and Xbox

Xbox One S 1TB Console - Fortnite Battle Royale Special Edition Bundle (Discontinued)

Fortnite cross-platform crossplay guide for PC, PS4, Xbox One, Switch, Mac and mobile - Polygon