In 1993, architect Hans Kollhoff's master plan for a major redevelopment including the construction of several skyscrapers was published. Due to a lack of demand it is unlikely these will be constructed. However, beginning with the reconstruction of the "Kaufhof" department store in 2004, and the biggest underground railway station of Berlin, some buildings were redesigned and new structures built on the square's south-eastern side. Sidewalks were expanded to shrink one of the avenues, a new underground garage was built, and commuter tunnels meant to keep pedestrians off the streets were removed. The surrounding buildings now house chain stores, fast-food restaurants, and fashion discounters. The "Alexa" shopping mall, with approximately 180 stores opened nearby in 2007, and a large "Saturn" electronic store was built and opened in 2008. The CUBIX multiplex cinema, which opened in November 2000, joined the team of Berlin International Film Festival cinemas in 2007, and the festival shows films on three of its screens. In January 2014, a 39-story residential tower designed by Frank Gehry was announced, but this project was put on hold in 2018.