Is there any place I can pitch this? Any game discussion groups with potential developers or a place where devs are looking for an interesting game project? What are possible next steps?
Maybe you can find help in one of those two boards:
Project DevelopmentInvestor-based gamesDescribe the idea generally in a separate topic and mention that you are looking for partenership or investors looking for a good opportunity.
Note that your best option is to hire someone to develop the game and lunch it by yourself without the need to be in partenership with anybody. If so, use this board to hire a dev:
Services