Well it's the only one in the series you can platinum. But considering Koei has been making the series as a 1 game per Playstation system, that makes me think that a PS Vita game might go into the works since we already have a PS3 game.

lol, that's okay! ;o Never played the first one! Only the one in the quiz! ;p

I forgot to mention this but Trinity: Souls of Zill O'll is a prequel not a sequel.