I just realized what it is that I had thought about when I came up with this beer - I've had something similar before. Storm King by Victory.
According to Untappd:
Description: A thundering hop presence collides with massive espresso and dark chocolate flavors in our dense and full-bodied imperial.
ABV: 9.1% IBU: 95
Interestingly enough, it seems the different years have different IBUs but always the same 9.1% ABV (so it might just be an error from people putting in the IBUs. Most years its 95 or 70 with one year being a 65).
The 2016 description gives: With a huge, Pacific Northwest hop aroma & character upfront, Storm King subsides into massive, roast malt complexity. More flavor than mere words can adequately describe. Rich and substantial, it will warm your heart. (This is the one year where its listed a 65IBU rather than 70IBU or 95IBU.)
The 2002 and a few other year descriptions give: Emerging from the deepest shades of darkness, a rolling crescendo of flavors burst forth from this robust stout. The thundering, hoppy appeal of Storm King subsides into the mellow subtleties of roasted malt, exhibiting an espresso-like depth of character in its finish. An exquisite blend of imported malts and whole flower American hops merge harmoniously in this complex ale. Discover the dark intrigue of Storm King, as it reveals the rich, substantial flavors that it holds within.
So I'm thinking maybe find a Storm King clone, and make a few adaptions to it, specifically to boost the ABV from 9.1 to 11-13%, and maybe up the bittering from 95IBU to something like 100-110. (Though 95 might be good enough to make it bitter-enough).