Possible sequence of events

While intuitively a linkage should begin with Park City Mountain Resort, The Canyons and Deer Valley, the latter might not be an immediate candidate in spite of the fact that its lifts and Park City's are already next to each other.
There is a possibility that all might begin between Deer Valley and Park City Mountain Resort, but this would require a creative solution that has not been explored as of yet. The next logical alternative for engaging the process could be to begin with Park City Mountain Resorts and The Canyons, then carry on with Big and then Little Cottonwood Canyons.

Phase One:
Park City Mountain Resorts and The Canyons,
With the added access runs between Pinecone Ridge and White Pine Canyon, this would place Park City's size in the 8,000 acre category, at par with Whistler-Blackcomb (8,171 acres) and well ahead of Vail (5,292 acres) Phase Two:
Park City Mountain Resorts, The Canyons, Brighton and Solitude.
Adding to the existing “Solbright” pass, this linkage would add some 1,500 from two access runs and would secure Park City's place as the hub of the largest interconnect in North America.Phase Three:
The Park City grouping would include Alta and Snowbird, and their “Altabird” linkage and would boast its acreage to almost 18,000, making it equal to the 7th Alpine interconnect.
Phase Four:
At that point, if not already at the previous stage, Deer Valley might decide to join the successful group . After adding a few more runs between Park City and Brighton, the seven resort network should break the 20,000 acre range and become the world's 6th interconnect in terms of size...Other likely sequences of "events" could be:

a) Deer Valley and Park City (provided "creative solution" makes sense for the stakeholders, then Solbright and/or The Canyons and Altabird.

b) Park City or The Canyons, then Solbright, then The Canyons or Park City, Altabird and finally Deer Valley.

c) Solbright and Altabird, then Park City and/or The Canyons, then Deer Valley.