I believe KF mentioned that it would be launched in the first week or so of November, a new sponsor will be announced at the same time (I guess we need to wait until the One Energy deal runs out at the end of October before we announce the next one, and therefore launch the new shirt), I believe its quite a 'big name' but the guy I know refused to tell me who it was.
No idea on design but I really liked the Magic Weekend shirt this year, thought it was the best we have had in a long time. Whether that means they will feel the need to stay away from a white kit given the proximity to the last white kit release I don't know. Or maybe they saw the success of the Magic shirt and will look to do something similar?