Gruv is already taking pre-ordered for a 2-film collection, so we know that a combined release will exist. This one is $44.96 forth, but doesn't appear to be a steelbook. Theoretically, the 15% off coupon could be used for this instead if you haven't used it yet.
I haven't seen this edition...
I don't see a button to actually order the steelbook. Perhaps they have sold out pre-orders already or temporarily suspended new orders.
In any cane, I'll stick with my Amazon preorder for now. I suspect they'll drop the price in due course. But I used the 15% off code for another order, so...