It's unlikely that they will add any stock. Based on watching the listings over the past year, in particular those that are back ordered, it looks like J. Crew puts in an order with Alden and releases the shoes/boots for sale on their website once they have confirmation of their order from Alden. Earlier this summer the expected ship date for these boots was late August. There have been confirmations in the Alden thread that folks who ordered them earlier this summer did, indeed, receive them in mid to late August.
You're probably not totally out of luck, though, as there are others who will likely return theirs for sizing reasons. But you have to monitor stock when the time comes.
Slightly off topic but I've noticed that J. Crew is not "buying deep" into many items. Once they're gone, they're gone. I've noticed several items that have not come back after they were sold out.