Infinity War is said to be the culmination of everything that has happened within the Marvel Cinematic Universe since Phase 1. From the characters, to the true arrival of Thanos, everything has been leading to these two films.
So it should come as no surprise that the film will not only be large in scope, but it will be told from several characters viewpoints. The Russo Brothers talked to ComicBook.Com about this:
“Oh, yeah! I mean, it has to,” Anthony Russo says when asked if Infinity War will be bigger than Civil War. “It’s a culmination of everything that’s occurred in the Marvel Universe up to the point where the Marvel Universe is released. Some of those films haven’t even hit yet. We’re going to be dealing with some of the characters from those movies who are going to be in Infinity War. They’re massive in scope and scale but that’s the point. The point is for them to be as ambitious as they possibly can be. They’re going to be multi-perspective films. They’re not called ‘Captain America: Infinity War,’ they’re called Infinity War. You’re going to be moving around through different perspectives of the characters. It’s like Nashville for super heroes. It’s storytelling that is vignetted storytelling. It’s to composite all of them under one story – everybody. You can culminate without all of them, so…”
Infinity War Part 1 arrives May 4th, 2018.