Parmandur
Book-Friend
I agree. Perhaps he'll shed some more insight to the canonical timeline of the Realms, and how AL fits into that. Perhaps he'll give some insight as to why we're all of a sudden having references to Greyhawk in the last few books. It seems the things we get the most straightforward answers to are on the books already published. Who knows, maybe he'll talk about what they planned to do with Sword Coast Legends if it didn't implode on itself.
But most of all, we might get some words that will lead to rampant fandom speculation, and it will be hilarious to get that, and then when the actual stuff comes out, look back to see how completely and utterly (not to mention obviously, once we see what hints we missed) wrong we were.
It's like a hobby unto itself!