I am just wondering, why BHG wants to do these single player scenes by yourselves? Is not it much easier for you to give us a level editor so every player can create their own single player levels and share with the community? It is the way to have unlimited creativity and content to offer to the players. Just imagine how many customized maps and package in starcraft and many many other games. As a basic editor, it allows map editing, defender types/number/location definition, attacker types/number definition. For further development, you can allow event triggering, unit experience gaining /upgrading system. It will be able to create so many historical battles by allowing every player to be a creator as well.