Will the book be coming back into production? I would love to buy one, but it would be cheaper to buy the updated Descent 2nd edition box for the adventure than current scalper prices.

I don't claim to have any insider information, but FFG's attention is focused mostly on their Star Wars IP. I would be surprised if you see anything from D2e, including reprints any time soon, if ever.

Don't pay scalper prices. What region are you in?