Istanbul city as a mega city bears strong background and concepts of history, tradition, culture, and art of Turkish community. Every year, Istanbul with unique traits is able to absorb too many tourists attention all around the world. However, in the recent years, it is under pressure of some projects which are executing or planning to be performed. Construction the third bridge, Istanbul canal, and third airport are examples of those controversial schemes which are still vague and indefinite in some aspects. Even though there are various discussions on the projects from different scientific views, it seems to be necessary to make a general analysis with strict decision on the possibilities of their executions. This article tries to give an image of Istanbul future with consideration to all what the plans are following. With putting together separate comments of researches and university professors on the project, it is attempting to predict the threats and effect in the future situation of Istanbul. Therefore, with regard to differently economic, social, political, ecological surveys of project together, it is summarised the effect of them as a table. Finally this article evaluates how much those projects make sense and meet the primary need of plans.