 Modern theorists speculate that

The 1935 Master plan of Moscow (Генплан 1935) changed the concept, effectively voiding all contest entries.The square was to be widened, as set in 1934 contest terms, but the Narkomtiazhprom site was reduced to Zaryadye only (1/3 of original area).Construction in Zaryadye commenced in 1947 (see Moscow Skyscrapers), and was cancelled again in early 1950s.