I'm thinking that probably at least something will be released. New colors, new outfits, old outfits, something. But obviously, especially since staff aren't allowed to discuss it, we shouldn't believe anything until we see it with our own eyes.
My advice would be to save up credits just in case, though I doubt very much that any costume would cost 10,000 (though magic might), and don't trade away any of your own rare costumes or items just because it might be rereleased. Don't count your chickens before they hatch so to speak.
If they do come out, you'll have the credits for them, if they don't you'll still have your items and since when would having extra credits be a bad thing?