VIDEO : Captain Marvel Absent From 'Avengers: Endgame' Trailer

The trailer for 'Avengers: Endgame' was released on Friday.
Fans are asking why Brie Larson's Captain Marvel is not in the trailer.
Captain Marvel is supposed to save the day in 'Avengers: Endgame.'
So, why is she missing from the trailer?
ComicBook.com reports the Russo brothers purposefully kept Larson's Captain Marvel out of the trailers.
---We want to save her reveal.--- Joe Russo said.
---very important to us to commit... to this ending very hard.---