The aim of this paper is to widely discuss the political situation of the Gulf Cooperation Council in the aftermath of the Arab Spring and to present the complexity of the relations between the member states of the Council and to describe their regional relationships especially regarding the aspect of rivalry and difficult neighborhood with Iran and cooperation with the United States. A larger part of the article is dedicated to the phenomena of the fundaments of unity between the Gulf states but also the sources of disharmony and disunity that prevent the further deepening and strengthening of intra-Gulf relations which should materialize in the formation of a Gulf Union. The article aspires also to give a forecast of possible scenarios of political and economic development in the GCC region upon the basic economic and social data. This forecast is presented in relation with the challenges that this region is facing.