Phoenix Wright was a great series for the original Nintendo DS. The trilogy will include Phoenix Wright: Ace Attorney, Phoenix Wright: Justice for All and Phoenix Wright: Trials and Tribulations.
The new trilogy will be enhanced for the higher resolution of the iOS devices and their Retina displays.
The good news is that you can also buy them individually. That’s a cool deal if you don’t want to pay for it all at once, or if you aren’t sure you will like the game.