Maybe in the distant future, we could choose factions(they would still be stickmen just different colors with slightly different skill sets).
Maybe something like different nationalities which are set by different colors.
For example ;
Green - America (default basic army;original setup)
Red - China (better wall building, maybe no tanks and instead rockets,slower but more damage. Or more of a magic orient theme, like spells etc.)
White - Russian theme( Faster soldiers, less gear to buy but more heavy artillary, etc.)
and so on..