Update 09/30/20: After the first preliminary injunction hearings, it has been agreed upon by Epic Games and Apple that this lawsuit should be settled by the Court and not a Jury trial.
The latest: No Jury trial
On September 28, the court held a lengthy injunction hearing to determine if it would require Apple to reinstate Fortnite onto the App Store—with Epic's own payment intact—while the case is decided. While that decision has not been made yet, the Judge supposed during the hearing that a Jury trial may be called for in order to produce a verdict that will better stand up to the inevitable multiple appeals.
