The upcoming UI tweaks to the Customizaton Station might mean an added "Costume" option, but it's probably just extending the skin data to contain more values :/
I highly doubt it'll be free though, even if it is just skins. Probably skip it as well if that's the case.
Unless there is a Tron skin for Zero, in which case I will buy the Flipping stuff out of that suit due to my massive Bro-love for TRON. --- Check out my Borderlands 2 Trade List: http://tinyurl.com/8cjskjb EVERY. SINGLE. RARE. ITEM.