This is the SDCC limited poster released by Marvel! The four posters correspond to the battle scenes in Avengers 1-4, which is very interesting.

By the way, let's know what SDCC is

The official full name of SDCC is Comic Con International: San Diego, which is generally called San Diego Comic Con. It was founded by Shell Dorf and others in 1970. It is held in San Diego, California every summer (usually at the end of July in recent years), and has been fixed in the San Diego Convention Center since 1991.