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Oh, I was already hoping for at least an official book about Heroes. Although I've already found fan fiction, but that's a different story.
1. If, for example, I want the option to choose Frida or Alaric in duel mode or in single-player, do I just need to download the appropriate patch?
2. And what is the difference between 5.5 and 3.1? I think many newcomers who come here with the same questions will also be interested. Personally, I understood that 5.5 is an improved version of 3.1?
3. What is the probability of a new Heroes 5 (8) being released, continuing the storyline of the previous parts? Dark Messiah didn't answer many questions, such as: where did Railag disappear to after Hammers of Fate, the beginning of the Unicorn Empire, the appearance of Kha-Belek and his destruction of the world, or, conversely, his further imprisonment. You could at least create a story about Kha-Belek's rise to power as a demon lord, revealing his personality!
UPDATE: It would be better to continue the series of the 5th game than the 6th and 7th.