Basically I thought about having the germans fight either against the russians or the allies.
Can be done as a group, each one having depending what he wants to play, more characters.
As an example if you're a Tank commander, also make the rest of the crew members, or a small group of elite soliders.
I still am not sure to 100%, open for any suggestions.

Also this is just to check if people would actually join me if I would open one ^^