Courtesy of SSC forumer iamtheSTIG, this alternate form was shown at the TimeWarner display, and as can be seen, includes the current form of the Culture/ex-Corset tower:
The form reverts to a morph, adds a beacon and setback; but the cladding is back to meh.
EDIT: Given a more hi-def look, there's more detail on the skin, albeit less than the version than the one with the tapered corner . Also, the beacon looks to consist of a separate setback of its own...and it looks to be surrounded by a ephemeral Bear-Sterns-like crown.