The design of the future is the design of trust in relation to uncertainty and risk. Although you cannot completely eliminate uncertainty and risk, as they are intrinsic of futures, trust operates as a category to mitigate and reducing uncertainty and risk by enabling methods to address them. In this paper we introduce Prospective Design via a comparative study between existing design future methodologies. In this study, we outlined their limitations and propose a mixed methodology aimed at combining and enhancing different approaches to present an integrative model that aims to reconcile different perspectives and improve the main task of design in our unpredictable and exponential technological age: designing trust in prospective futures.