Spoke with Artist Alice X. Zhang today at New York Comic Con, and she confirmed that BBC commissioned her to do the artwork on the Doctor Who: Series 10 Steelbook.
Here is the front/back artwork of which she created.
was going to wait until a further price drop, but the equation (amazon listing stating exclusive ) + (missing out on the Series 9 steel ) - (likely greater print run this time ) + (that price! ) = still got to pre-order now, for me!
EDIT - you probably won't thank me for spotting this, but Amazon have a few (7 at time of posting) new ones kicking around for only 84p more: Amazon product
Now, had it been one of the uber-rare Series 9 steelbooks that go for silly money...