Forgive the resolution of the image, but it's key to seeing what I'm talking about. I think the above picture clarifies why we haven't seen Barbossa yet. Looking closely at the image, I'd say he has one of the most intricate costumes to make, maybe more than Sao. Look at the patterning on his inner shirt and even skarf around his waist looks very detailed on one side. They may not match it 100%, but to come even close might take a fair ammount of sourcing for the materials. Even his coat, if done right, is an interesting texture and may not be easily replicated. The clothing alone will be stunning when/if they produce him.