Every puzzle has an answer and Professor Layton and the Unwound Future isn’t much of a riddle.
Level 5 registered a trademark for Professor Layton and the Unwound Future. While it’s not a direct Japanese translation, the subtitle suggests Layton (and his sidekick Luke) are heading to the future. That’s basically the plot of the final game in this Layton trilogy.
Pending E3 announcement from Nintendo? Seems like it. Nintendo announced Professor Layton and the Diabolical Box at the show last year.