I really couldn't believe this news! Level 5, creator of the famous detective Prof. Layton has announced that they will do a crossover with Capcom's ace attorney Naruhodo Ryuichi (Phoenix Wright in the west) in an upcoming game for the Nintendo 3DS.
Currently known only as “Professor Layton vs Ace Attorney”, the real title will be created by Gyakuten Saiban’s creator Takumi Shuu. The story will be set in a medieval era, and will involve witches and also “puzzles with contradiction”, according to Level 5.
How Phoenix got to that time line, I'm not entirely sure but apparently he is defending a girl that had been accused of being a witch by Professor Layton.
I personally would love to play this game since I'm a big fan of Ace Attorney series.