Glad to see the III love.... it got smacked around too much by Suikoden II lovers.
III is my favorite. The best game, the best Tenkai star (Thomas FTW), and I loved it's battle system. II was a good game, but a lot of the greatness attributed to it, I think, was due to the supporting media that came with it. The Gaiden games, the Encyclopedias, and other media really helped build the world and add flesh to the characters, but on it's own, I don't think Suikoden II was god's great gift to earth that some fans make it out to be.
And because of the complaints, we got Suikoden IV and V, which while good games and games that I enjoyed, basically was trying to mimic I and II, instead of being something original. I also thought III's 3D was a really good and natural progression for the game, while IV's was just ugly, and V's isometric view wasn't much good either (characters looked okay in cutscenes).
As for a Suikoden VI...I am sad to have to say this, but that ship has long set sail.
Consider this: It has been
10 YEARS since the last "present" Suikoden game (Suikoden III) and
6 YEARS since the last main Suikoden game (Suikoden V). Nobody other than the hardcore fans are going to remember the events or the significance of the events in Suikoden IV, V, I, II or III.
As much as we'd like the to go to Harmonia to finish up loose ends and crap like that, who's going to remember the likes of Yuber and Pesmerga and Flik and Victor other than the hardcore fans?
Konami can attempt to do things like re-release it (and from what I heard, the PSP re-release of Suikoden I & II didn't do too well) or even remake it...in an attempt to bring new audience up to speed and maybe eventually make a Suikoden VI, but how well will that be? I can't imagine it'd do super well in this weird gaming generation that we're in.
So...I've basically given up on it. Suikoden was never THAT huge of a series where they can count on the nostalgia effect to help push sales, and Konami seem intent on just using the name to make random generic JRPGs...Just enjoy what you had, and be thankful they ever existed at all.
So...Suikoden VI for iOS and Android!!111