Next determine who your market really is. You may end up having two market demographics: one for the product and one for the opportunity. Develop a market plan for each demographic. Not everyone is an entrepreneur but they may still be interested in the product. This is why quality is key. The product has to be able to stand on its own without the opportunity. Not everyone is going to be interested in the product. Try to narrow down the demographics of those that would be interested so that you can communicate more receptively with your market.
Corrective Plan. A marketing plan is a living document. Trust me, the moment you have it and experience planning your marketing, you will realize this. Therefore it is a plan that allows you to assess past strategies and results and at the same time allow you to make necessary corrective measures to fit your business growth. for example, who expected the 2008 financial crisis to hit us so badly? No one other than the few so called "economists" but how did responded to it? Severely. Many businesses closed including many giants. But the good thing is, many have a solid marketing and business plans, therefore they make quick corrective actions and moved forward.