I think our own Jeremy made this article.
A new shopping district called "
The Gateway at Rapid City" is planned north of I-90 next to Cabela's.
Cabela’s development gets new site plan » RapidCityJournal.com (http://www.rapidcityjournal.com/articles/2008/10/06/news/top/doc48ea9a47c34c1108773917.txt - broken link)
Foursquare Properties
On the site plan, I think the building marked "Building A" is the current Cabela's. I'm assuming the larger "Building B" next to it will be Sam's or whichever home improvement center goes in. Beings we already have a Lowe's, Menard's, and several Ace's I'd guess it to be a Home Depot.