I don't think it's a case of OC characters, I genuinely think it is a case of getting the guy out the door. The wristblade comes from Jungle Hunter, the gun from Cleopatra, the skin texture from the Super Predator, and the same lighting bugs from Wolf.
I do think Fox and Disney would have a say in where this guy fits. He didn't make it into the final film so he's usable beyond it, but given the whole appeal is the Emissary, why he's not on model makes no sense. And even still doesn't make sense within context. See the Emissary are supposed to be rogue Stargazer affiliated Predator. They're still gonna kill shit, but they're here as representatives, whereas here this guy is just styled with millitary gear. What exactly is he an Emissary of?
And further creates confusion for me as why this isn't Fugitive. Just reuse the Jungle Hunter body and head if we're gonna make a new armor model anyways, both gauntlets are identical and they planned on using the fourth film's mask anyways. Just reuse Wolf's gun rig and make a new gun. It's all the same work load but doesn't result in texture issues and is more on model.