I was thinking of a way to add different alternate factions. Not necessarily entirely new factions but adding one or more fighters to the current factions that are outsiders but similar. For instance knights could get the Spartan. Samurai could get something like a Mongol or maybe Shaolin monk..? I don't have any great ideas for the Vikings, maybe a Native American Brave or something tribal, maybe Zulu..?

Anyways just an idea, let me know if any of you have some ideas to strengthen mine.