In September 2019, city government announced that nothing will be built on the island. A new Detailed Regulatory Plan was adopted, by which the city plans to raise the percentage of green areas in Belgrade from 15% to 25%, including further forestation of the Great War Island, with reinsurance that everything will be done to "keep and preserve" the island. Just few days after adopting controversial plan on massive construction along the Belgrade's main water supply source Makiš, city announced building of the new water supply source on the Great War Island in January 2021. A tender for the study on the matter was announced right away. Intensive expansion of the city and reduced yield of present sources was named as the reason. After the negative public reaction, city officials stated this was just a possibility, an alternative, and that maybe only Ranney collectors will be built, without any further urbanization of the island.