In that photo, the directors challenged fans to “look hard.†While nothing out of the ordinary stuck out, people noted that the easel and the ladder look both look like the letter “a,†fitting in nicely with the rumored Avengers: Annihilation title.
Previously, people thought the title would be Avengers: Assemble, which sounds heroic enough, but doesn’t really fit with what’s at stake. Plus, that was the title used for the first Avengers movie in the UK.
Annihilation sounds more fitting because half of the universe was annihilated by Thanos. And, like Marvel president Kevin Feige said, the title for Avengers 4 is a spoiler for Avengers: Infinity War. That’s been one hesitation from Marvel for not revealing the title.
Article source: https://www.technobuffalo.com/2018/10/07/avengers-4-title-annihilation-confirmed/