After the closure of the Sunflower Army Ammunition Plant in 1992, plans for potential development of the 15.5 square mile lot (the largest single tract of land in the Kansas City Metropolitan Area, and the largest single urban redevelopment site in the United States)[2] began to make rounds around locals, plans for an Oz Entertainment amusement park consumed seven futile years, after which the land was transferred to the Sunflower Redevelopment Group in 2005.

Recently, a master use plan has been adopted by the cities of Olathe, De Soto, the State of Kansas and Sunflower.

[2] The master plan calls for high density housing, major commercial zoning, a "downtown" area for offices, high density commercial and civic uses, and land promised to The University of Kansas, Kansas State University and the City of De Soto, as well as land being reserved for the army reserves, parks and other public spaces.

[2] It is speculated that the entire 15.5 square mile tract will be split for the three surrounding municipalities, those being Olathe, Gardner and De Soto.

[2] When completed, it is also speculated that the area will house over 25 thousand individuals as well as being a major tourism and historical center for Johnson County.