I see a lot of different opinions but I think this needs to be said...
Are you people reading what you're saying? Have you learned nothing from the Suikoden games? If you were to fully analyze the storylines as much as the site claims to and still not see what needs to be done then I think someone failed.
Suikoden could teach a meager person that they can draw strength from others and, in large numbers, can make a difference. Economics aside, Tierkreis wasn't that great a game. True. But did you see the main series making leaps and bounds aside from being a storyline set in a time period that moved forward? If people want to see a sixth game then instead of pleading with them, POINT OUT what you'd like to see! They could make a sixth game and STILL not wrap it up but merely open up more questions!
Hell, there's room for improvement for the main series. But if fans are merely going to yap on about how they want a sixth title to main line of games, then what good are you truly doing? Being vague isn't going to help. The makers and writers aren't mind readers--tell them what you want in the new game. But be objective about it! Don't submit ideas that're complete fan service and only that! Because if you only appeal to the fans then no one new will want to try it, and the series won't ever grow.
So come on people, instead of merely speculating, why not do as the main characters did, as the WRITERS had them do--learn from the characters and band together to become a stronger machine to push the ideal that Suikoden VI must be made and for good reasons. In another thread I said I was going to buy the next Suikoden as fan support but it's merely to see if there's even a glimmer of hope that they'll go back to the original series.
Now come on...buying the new Suikoden to give it a chance is harmless, but...try this: If the game doesn't meet up to the standards of the main series then give Konami a FIERCE backlash of negativity that might rattle the developers to continue the main series.

That'd give 'em a little insight.