If Diagon is indeed back on the table, my guess would be the original spot of SNW for Universal Studios Hollywood (Mummy, Soundstages 33-37/41-43 and the rehearsal hall).A few questions:
1. What is the rumored new location? Mummy, the tram, somewhere else?
2. What was the rumored exclusive land that would have used this plot if DA didn’t come?
If this is the 2022 addition; then expect movement to begin at a fast pace. A good guess might be shortly after Labor Day.
...Part of me wonders, if this will correlate more with the Front Lot changes, so they can further soundproof studio facilities while future-proofing the park in the terms of sound bleed.