Disney in 2018 is actually not that strong by their high standards. Apart from the big three of Han Solo, Avengers and Incredibles, they will have a solid enough year. I am starting to doubt Aladdin, Dumbo or even Mulan will make a 2018 date.
Disney in 2019 is on another level of strong. They could have 5 films that make a billion, but then again, potential billion dollar films like Guardians 2 and Pirates did not get close this year, so you never know.