Spoiler alert!
Thanks to some J.K. Rowling comments, we know a few things about Harry Potter and the Deathly Hallows: that the flying car in the whomping willow will make an appearance, and Kreacher the house-elf is important. Thus, I have pieced together the plot of book seven: Dobby and Kreacher get the car out of the tree, and go on a spring-break roadtrip in search of elf trim. Voldemort dies of pneumonia.
Solved! Next!
Solved! Next!