Adding a new type of great leader?

[Dogzilla]

This may be beyond the scope of what can be modded, but I thought the omission of a great military leader was strange and a little disappointing. Maybe someone who knows can say if it is possible or not. Otherwise, perhaps Firaxis will consider adding it in an expansion.
Thread here http://forums.civfanatics.com/showthread.php?t=131610 discussing possible abilities.

 

[Tunch Khan]

It should easily be modded according to XML and Pythonians here And you are right, I miss them too.

 

[jbfballrb]

it should be. you can look at the Desert War assets, as they added a great commander there.