This rendering is for yet another unbuilt World Showcase pavilion, this time with the rather nebulous theme of “Arab nations.” This is not one of the well-known abandoned concepts for present day World Showcase, but rather an attraction intended for the original separately-gated iteration of the Showcase that would have been built near the Transportation & Ticket Center. The rendering dates to early 1976; later that year, the World Showcase concept would be combined with that for the Future World Theme Center and start to resemble the park that would eventually open in 1982.
The original design for World Showcase consisted of two large, multi-level semicircular buildings. Between ten and thirty nations would be represented in these structures, occupying wedge-shaped pavilions of various sizes. The buildings would be linked by WEDway PeopleMovers, which as you can see in the rendering would also pass through the show buildings.
This original World Showcase was supposed to begin construction near the Seven Seas Lagoon in 1977, with an anticipated opening date of 1979.