Consider how your business will run day-to-day; how it will make money and who your customers will be. Identify companies that are already producing similar products, who their clients are and the markets they trade in. Consider recent market trends and future predictions and define how your business will operate in this market.
Don't worry about the story of your venture, pitch deck design or even which slides you will include at this point. Instead, focus on creating a simple deck that describes you, your idea, the problem it solves, the market, competitors and business model.
Congratulations! You have a prototype business.