Emm...maybe you should inform yourself before voting :p
And what means "newest DS Ace Attorney game"?
A game that already is released in japan (last february) but not will be localized in the usa?? No, that is Gyakuten kenji2.
The game that is still not been released but announced to be localized in the usa?? No, that is Prof.Layton vs Phoenix Wright.
The games that are speculated to be announced next week at the TGS (Tokyo Game show)?? No, that would be Phoenix Write 5 or Ace Attorney Investigation 3.
Gyakuten Saiban Jiten (rom number 0996) is an "anthology" (similar to the 4° disc in FF7 International or the "Omake" mode in Chrono Trigger PSX/NDS) of the original games from the GBA and the added case of the NDS remake.
See all the intros of the cases, all animation of the characters, all backgrounds, all places, all evidence etc... of the first 3 games Phoenix Write.