In the panel showing that infinity war is the highest grossing movie. Making over 1$ billion showing the interest in movies of that structure. As well a similar trend can be seen with the rest of the movies of 2018 with superhero action movies like Black Panther, Deadpool 2 and Ant-man and the Wasp being in the top 10 of the box offices.
A thing that is the same about all these movies is there genre. With fan base surrounding the superhero genre and their expanded universe making people feel obliged to watch them if they have investment in the story told so far. As well since these movies are all action based it would draw in a large audience due to its usual lack of complexity making easy but entertaining to follow for any audience.
Another thing the 2018 box office shows is that most of the high grossing movies are made in the United States. This is due to the united states having one of the biggest and most technologically advanced movie studies in the world located in Hollywood. As well since the United States has the worlds largest economy an vast majority of the population would likely be able to afford seeing these movies. As well some of the movies lower down on the list are Chinese, which can be explained by china having the largest population in the world, giving its movies a population of over 1 billion to market to.
Overall the current box office of 2018 shows that there is a very specific and easy way to make a successful movie. However if you take that formula and utilise it to make your movie as good as possible like Deadpool 2 and Avengers: Infinity War did then it will make a much large profit with Infinity War becoming the 4th highest grossing movie of all time.