The only thing that may happen is a 4 laning of 76 from the overpass where 465 ends to the Shepard of the Hills Expressway/376. That connection from the south that thelarsonsix mentioned is what I had read too but its going to be a long time coming. I do know that on busy days, the traffic will back up from 76 all the way down 265 to 376 cause I've hit it before.
I can see the desire on Herschend's part to have an expressway like that. Coming from Ark, it would be great for me. However, I don't see how that would effect folks going there. They are already having fight trailers and boats on 165 and 265 alt routes over the dam to get to SDC.
Unless they change the tune on that, they might as well list it for sale.