Marvel decides not to split Avengers: Infinity War into two movies

Marvel has made a small but important change to its film schedule: it's still planning to release Avengers films in 2018 and 2019, but they'll no longer be two parts of the same story. The first film will keep the title Avengers: Infinity War, but the second picture is now untitled, dropping its previous Infinity War — Part II moniker.
The studio didn't elaborate on what this means for either film's story. More than likely, the change means they'll be a bit more disconnected than