Leadership is the first and foremost factor. It will make the venture or break it. The passionate leadership who is willing to sacrifice everything for the success of the venture will make it happen. Leadership will remain single most important factor in the success.
Vision is all about how the leader looks into future. How big he is looking into, how clear it is? Yes clear vision is very important point so that team can start marching to achieve it. Vision makes task of the team very clear. Clear Vision is near to success.