Maybe a mobile videogame of Star*Drive.
In the next Fortnite chapter the island will be invaded by spelljammers!
Teorically "Planejammer" has got the highest number of possibilities, but we can't be totally sure. A mixture of Planescape, Spelljammer, but also adding some elements from "d20 Future". Let's remember the fraals were canon in 2nd, and the seshayans appeared in Dragon Magazine.
With the sundering event the "Realmspace" or Torilian solar system could have been rebooted. Some planets of this space could be used as a softer version of elemental planes for low-level PCs.
WotC confirmes pretigious ufologists have been hired as cultural consultant for the development of alien civilitations. Thanks very much specially for the help by people from the exoplanet Ummo.