This paper explores how AI-based game design affects the game development process and the role structure of game development teams, with a particular focus on the changes it brings during the early game project proposal phase. We present a comparison of game design proposal cases conducted by a game designer over a span of four years, showcasing how the utilization of artificial intelligence is re-empowering game designers. We envision a empowered game designer capable of market sensing, artwork creation, playable prototype development, subsequent game analysis, and operations all by oneself or with a very small team, a "super game designer". This paper illustrates how AI is ushering in a new era for game designers, and discusses the potential to stimulate innovation within the game industry by fostering creativity and imagination of game designers.