If you can make it all the way to the end of the article and are confused by the phrase "it will all end in pizza," it's a common Brazillian phrase which means

If you can make it all the way to the end of the article and are confused by the phrase "it will all end in pizza," it's a common Brazillian phrase which means "and nothing will happen", as in, the leaders all got together, talked about the issue, couldn't decide anything, got hungry and ordered a pizza.