Do you think there is any incentive or desire for them to make the next game (assuming they make one) in less than 8 whole years?

They admitted there was significant scope screep. Could they not just hire a project manager and take on more staff? The problem is that they're mega rich and can afford to take their time and do what they want. And while this does produce good games which I will buy and enjoy, I would prefer not to wait 8 years.