Brainstorming digital platforms are Information Systems that take place in the Digital Ecosystem (DE) of Organizations. They are emerged from the organizations need to overcome technical limitations when running brainstorming sessions with experts groups. Additionally, System of Information Systems (SoIS) are special type of System of Systems (SoS) that links together several Information Systems producing overwhelming amount of information to achieve an added value for organizations. In this paper we aim to study the integration of brainstorming platform in a System of Information Systems (SoIS). We propose a model for the brain-storming platform and an architectural model of SoIS that will help in creating the first prototype and facilitate the process of integrating the brainstorming platform in the orchestration of the SoIS. This will pose a significant technical improvement in terms of information interoperability that overcomes conceptual and technical barriers. In this paper we are moving towards a complex Digital Ecosystem (DE) by modeling and developing a prototype that allows the integration of brainstorming platform in a System of Information Systems (SoIS).