Deadline reports, in a move the Russos previously suggested would eventually be coming, Avengers: Infinity War Part 1 has been officially retitled simply Avengers: Infinity War.
So, considering the strength of the Avengers brand, it’s likely both Avengers: Infinity War and Untitled Avengers are likely to be two more hits for Marvel Studios.
Avengers: Infinity War Part 2’s title is currently in a state of flux, with the studio calling it only Untitled Avengers for the moment.
Based on Marvel’s titling patterns, it’s likely the fourth Avengers film will ultimately receive a different subtitle than Infinity War.