There's a Black Hand playermodel available in Just Cause 2 Multiplayer that seems like it came from the internal game files but is not available in normal gameplay.
I'm not 100% sure that this playermodel is in fact cut content, it may have been created for use in Just Cause 2 Multiplayer.
If the former is true though, does that mean the Black Hand were going to be in all three games originally but were then cut?