Some factions(such as Near Harad, Moredain, Tauredain, etc) have separate gear for their Captains/Chieftains. I thought it could be cool (and I have asked around before suggesting, many people have agreed this should be added) if Gundabad/Mordor Chieftains could have a helmet similar to the Near Harad Warlord helmet for its extra textures, except on the ends would be Skulls. Orcs have worn things similar to this before, such as Guritz (even though he is non-canon) from the Return of the King. This is not a major addition, just a small way to improve how Orc Chiefs can be more diversified, similar to how other Mercenary Captains from other factions do.
Here is my nearly finished model of the helm. I dont know how to implent a skull as texture with function, because I personally think that the skulls should be a 3D model like at the Skull Staff and so this part must do by Gruk, if Mevans take this small but sweet suggestion. I crossed my fingers for you 9koopa!
EDIT: It dont really fit the item :D But I must sleep. Tomorrow you get another item texture :)