This seems like a formula for a potentially adequate team to turn an idea into a product. The challenge is that your startup team needs to build a business. At a minimum that means that you need to discover and build your market and manage your cashflow. It may mean that you need to raise funds (in potentially many different ways and many different rounds).
The startup landscape is littered with the husks of "businesses" that started as a compelling idea (at least compelling to the cofounders) developed a well-engineered solution to a problem that no one wanted to pay to solve, then ran out of money.
Full disclosure: I coach/consult entrepreneurs as they start, stabilize, and scale their businesses - so it's easy to dismiss what I'm about to say as a sales pitch. That said, whether you've stared 0 businesses or 500 businesses before - HIRE AN INDEPENDENT COACH. You don't know what your biases are - but you have them and they will bite you every time. Google is a great resource - but the forms and contracts and plans you can download from Google are input data, not complete solutions. (end of rant)