Avengers Endgame: 7 Theories That Could Break The Marvel Cinematic Universe

How many times have you watched the Avengers: Endgame trailer so far? Now, how many crazy theories have you come up with about where the Marvel Cinematic Universe is headed? How many of these theories completely undo everything we know and love about Marvel's movies? The first Avengers: Endgame trailer left us all with more questions than answers, and since the movie isn't coming out until April 26, 2019, we'll have to fill in the gaps ourselves.Dropping out of nowhere on the morning of Decembe