What might happen to football when Messi & Ronaldo retire?

Over the last 10 years, Lionel Messi and Cristiano Ronaldo have set standards as to how football greatness is measured. Both superstars have amassed legions of fans between the most arguing who among the two is better. But what do you might happen if both of them will retire in Football? Refer to this page: https://bit.ly/2w8tYvN