I'll just replace Dash Gunmetal with Samuel L. Jackson, then.
The story takes place in the 2560's, and there are 4 major powers, mainly based off of 'what if?' ideas I've had while studying history.
Team "Scary Mongols" is the result of the mongol invasions reaching the Atlantic coast, giving them control of most of Eurasia.
Team "Roman Moonmen" Makes up the 'good' team. The Romans have a colony on the Moon, and recently began recolonizing the Earth, starting in Australia. Nobody else knows this yet, so a special ops team (the main characters) is being assembled from the greatest people in history in order to defend the Last Republic and smite the Commies.
Team "Viking Overlord" is a union of Denmark, Norway, and Iceland, and they got enough reinforcements into Newfoundland to crush all before them, and now they control enough island chains and continents to put heavy tariffs on all sea trade in the Atlantic and (parts of) the Pacific.
Team "Robo-Aztec" is a civilization of Futuristic Borg-Aztecs from FURTHER in the future who want to assimilate everyone else into their commune. In 1492, Colombus sailed the ocean blue. And got his butt kicked by these guys. They control South and Central America.
Current 5-Human team stands at...
Samuel L. Jackson
William Wallace
Nikolai Tesla
Liver Eatin' Johnson
[Insert Badass]
The characters are chosen for their awesomeness. The story will be action heavy, as there is no other way to deal with Robo-Aztecs, Vikings, and Mongol Hordes.