tl;dr:
There wont be a reboot.
A Realmslore consultant, unless he or she works in-house at WotC, isn't getting paid.
AFAICT, Forgotten Realms was a TSR project from the get go.
Ed Greenwood started working on the Realms when he was six years old--well before D&D came along.
TSR purchased the Realms from Greenwood, with strings attached.
The final authority on matters of Realmslore is and always has been Greenwood, notwithstanding WotC's effort to "break away" in 4E.
If you're not going to make settings separate things with their own identities, might as well not care about different settings at all. They could drop the Forgotten Realms name, call it "The World of Dungeons & Dragons" and shoehorn in everything they think is cool enough to stay under the D&D umbrella.
TSR tried this once. It was called 2nd Edition D&D and the setting was called the Forgotten Realms. The moto was, "If it's in D&D, it's in the Realms."
And that's what they did: every rule, monster, magic item, etc., made it into the Realms and the Realms was chock full of portals (gates, for you old timers) and other means of travel to alternate worlds and dimensions, so everything could make its way to the Realms.
3E saw that come to an end (mostly).
Once again the wheel turns with 5E.
DL fans like me get screwed again. Well, I've bought my 3 rule books for 5e. No more. Not another penny to WotC. I know it won't make a difference to them, but it's important to me to quit supporting a company that doesn't care about a segment of its customer base.
Unless or until WotC says they don't care about you, all you're doing is helping to make sure a DL release doesn't happen.
Well I can tell you that it won't happen. Most FR fans would not be happy with anything short of a reboot. Go and check out the Candlekeep forums and you will see what I'm talking about.
Candlekeep isn't representative of the Realms fan base.
Then most FR fans can run their campaigns before/during/after the Time of Troubles, using the material they already own. They don't have to buy new books; new players don't have to pay hardcover prices for 30-year-old setting fluff; interested players can buy the new stuff; everybody wins.
Give this man a gold star.
It's about levels of immersion.
Consider: If you're a casual gamer or new to D&D, most of what you need to know about the Realms is already in the core rulebooks. You can purchase new adventures and you don't have to worry about 28+ years of Realmslore, because the adventure paths tell you what you need to know.