Amazon have emailed today to say that the second Professor Layton DS game is now available to "pre-order". The UK title may be Professor Layton and Pandora's Box with the US title currently listed as Professor Layton and The Diabolical Box. I believe this is actually a prequel story-wise to Professor Layton and the Curious Village but with an increased variety of puzzles and more video clips.
The US release date is 24 August, the UK is 25 September.
Synopsis: In the world of Professor Layton, puzzles hide in every corner. When the professor's mentor is mysteriously murdered, a cursed artefact called the Elysian Box appears to be behind it. With a ticket to the Molentary Express as their only lead, Professor Layton and Luke embark on an adventure that will test their wits and work their brains. Calling all brainteaser fans! With tons of in-game puzzles of different types and difficulties, there's something for everyone from kids to adults. As Professor Layton, you'll open doors with sliding puzzles, uncover clues with logic puzzles, and find answers by solving riddles. A cinematic experience! This large-scale sequel to Professor Layton and the Curious Village™ features three times the voiced dialogue and movies of its predecessor. The fully voiced movies, hand-drawn art style, and cast of eccentric characters bring the story to life and are sure to charm puzzle fans young and old.