Looks like someone on Ompuchaneru beat everyone else (that I'm aware of) to the scoop on the arrival of Tobu's new Noda Line rolling stock. It looks pretty good: http://rail-uploader.khz-net.com/index.php?id=1084296 . Not sure what they think of it, but several posters say they thought it was new Seibu rolling stock, others mention Sotetsu and Odakyu :)