The continuation of the story of Ashan, or Zephyr XVI and Alex III.

Well, you shouldn't have mentioned the criticism... ;)
I suggest making a third expansion pack; it should include another alternate upgrade, add five new castles, another ten heroes, 1 spell, 2 artifacts, and 3 new maps.
The plot: Suddenly, a super-duper demon appears from the ground. A super-duper knight, also very cool, learns about this. And they fight. The elves from the forests and the underworld watch this and think: "We want that too," and declare war. The undead decide to have some fun with the dwarves, and the orcs with the mages. Isn't that great? Five more races will appear later...
Campaign 1
For the super-duper demon.
Come and kill everyone!
Campaign 2
For the super knight
Kill the demon that is killing everyone!
Campaign 3
Total chaos!
Objectives: Watch what's happening on the screen, read the credits.
Buy our heroes!
Also coming soon: Heroes 5: The Waffles Attack! and Heroes 5: Where did the other five races go?
We promise even more alternate upgrades and breathtaking campaigns...