WARNING: This post contains Shazam! Fury of the Gods SPOILERS!
Shazam: Fury of the Gods drops a subtle hint at an upcoming DC Universe movie, making it the first time a DCEU film sets up a DCU installment. Shazam: Fury of the Gods is one of the last releases from Warner Bros.' original era of the DC Universe as the franchise gets ready to reboot and give way to the first chapter in James Gunn and Peter Safran's DCU, "Gods and Monsters." With the canon status of characters such as Zachary Levi's Shazam and Jason Momoa's Aquaman up in the air, any signs of a possible return to the DCU are helpful to understand the DC Universe's future.
Shazam: Fury of the Gods focuses on being a standalone sequel to Shazam!. Yes, Gal Gadot's Wonder Woman makes a cameo and brings Billy Batson back to life, but she doesn't take away Billy's role as the main hero of the story. Shazam: Fury of the Gods' self-contained story makes it easy for the next era of the DC Universe to incorporate him into the new continuity, and Billy Batson and his family are left eager to continue their heroic adventures in the future. Besides, the first Shazam: Fury of the Gods post-credits scene provides the first step towards the birth of the new DC Universe.
