Were I to guess, I'd say:
The Amazing Adventures of Kavalier and Clay- 20+ years from now
Oryx and Crake or The Handmaid's Tale- 10+ years from now
Devil In the White City- any time now
That's based on trends I noticed in 3 years at Borders prior to their closing. All of those books were being requested by high school kids based on reading lists assigned.
edit: The Franzen title is also likely.