Well, we've had a remake of Ys I and II for the DS so it shouldn't be surprising that the PSP will be getting its own version too. Announced together with Ys VII, "Ys I & II Chronicles" will feature the following:

• Four difficulty levels - Easy, Normal, Hard, Nightmare
• Choose PSP or Windows version in-game illustrations.
• Boss Rush Mode.
• Choose from the original PC-8801, Windows or PSP music.
• NPCs' dialogue changes.

Not sure I would play the titles again just for these features. Unlike Chrono Trigger, the story just isn't as compelling.