STILL waiting on a scan of that original Kubo FTB art that was included with this week's chapter in WSJ. Apparently posters are a bitch to scan. All I know about it for sure is that it's IchiRuki. According to sketchbaka , "It's Dark Rukia vs Ichigo on desert. On the announcement was written, "a poster Kubo-sensei draw with all his might" Hopefully someone will scan it soon."
In the meantime, have a lovely IchiRuki calendar art from the Versus Crusade Calendar found by Mel.