Shu Takumi had plenty of ideas up his sleeve for Professor Layton Vs. Ace Attorney, some of which will now come as DLC.
Siliconera report that a fair bit of the original script had to be edited/cut, so a form of Director's Cut from the Ace Attorney writer will be available shortly after the Japanese November 29th release.
The extra storyline will then be playable after clearing the main game, granting Nintendo 3DS sleuths to a wealth of out-takes and the original, unabridged story.