How many factions are there?

Well, before the release of "Hammers of Fate," many people complained about why Orcs weren't included, as they had always been in the "Heroes" games, and so on. Now, Orcs are here. It's the latest popular fantasy race. As for adding things like a swamp or a second dungeon, I'm against it because eight races are more than enough (in my opinion), and adding new ones would be a complete repetition of "Heroes of Might and Magic III."
In general, "Heroes of Might and Magic V" will have eight races, and that's it. So, we'll have to accept it.