Continuing as its been going. They're not going to produce a hardcover setting book because the current D&D staff does not care to worry about or carry on with Forgotten Realms "canon" anymore. Worrying about the "canon" is what made them jump 100 years in the future in the first place (as it was the only way they could think of to wipe the slate clean for new products / new characters / less info for new players to digest, while at the same time not "re-writing" Realms history.)
Now that they don't care about it, they don't need to try and jury-rig explanations about how or when all their Adventure Paths fit together, nor need to keep all their novel writers up-to-date so that they don't accidentally overlap or negate each other, nor have to try and invent all manner of "stuff" to put into a campaign setting book for those regions that haven't year been covered by any of the APs (which would also then hamstring them in the future if they come up with cool ideas for new APs but then have to find places to put them that don't mess around with what they made up for the setting book.)
Right now they have an empty slate upon which they can write anything they want. And its probably a breath of fresh air for all of them.