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I decided to look for information about Heroes of Might and Magic 6, and here's what I found:
"Heroes of Might & Magic 6 is in development. Published: 04/01/2008, 04:47. Nival Interactive has officially announced the start of work on the sixth installment of the strategic series, Heroes of Might and Magic 6, which our editorial team is incredibly happy about. Unfortunately, the developers are unusually stingy with comments regarding the next part of "Heroes," but we managed to find out some information.
So, HOMM 6, unlike its predecessor, will take us to the lands of Jadame, which we explored in Might & Magic 8 (RPG series). Now, a new threat looms over Jadame, far worse than natural disasters. An ancient evil is ready to reassert its claim to rule over the planet. Helping this evil in its dark deeds will, of course, be the Krignans, who, starting with the sixth installment of the series, have been constantly causing all sorts of trouble for the Ironfist clan and the continent as a whole.
We can expect more than 200 types of new units, and there will be a campaign for the Krignans, in which we can personally destroy everything that we will diligently defend in other campaigns. Unfortunately, this is where the information about the plot and new features ends. However, the developers hinted that owners of top-end video cards will have something to look forward to, and this can only mean that DirectX 10 continues its proud march through the offices of developers, forcing us to upgrade our hardware again."
http://igronews.com/news/2866.html