Even stuff announced at D23 doesn't always come to fruition.In general, insiders won't know inside information about what news is going to break at D23. They know some 'secret projects' in the works that they have shared with us, but have no idea if management will use D23 to break it and confirm it except maybe within a week of D23 when presentations are being thrown together, and even then, last time, that kept changing.
And if they know secret stuff that hasn't been leaked yet, then they can't really say if it will break at D23 because they're keeping it secret.
TMALSS: Asking what will be addressed at D23 is usually fruitless.
Moment of Silence for the Main Street Theater.