The Netherrealm Studios have released the patch 1.13 for 'Mortal Kombat 11', with which the crossplay feature is now also available here.
Crossplay support has not yet been officially announced, but a look at the patch notes reveals exactly this detail. This means that PS4 and Xbox One players can now compete with and against each other in the tournaments.
Patch 1.13 Patch Notes
- Add Crossplay
- General bug fixes
- Gameplay updates
Support for Mortal Kombat 11 is still ongoing. So in January the joker will follow as a playable character, as well as spawn in March 2020. Netherrealm also promises a special surprise for fans next year. What that will be is currently unclear.