In an interview with /Film, co-directors Joe and Anthony Russo were asked about Captain Marvel’s new look for Marvel Studios’ Avengers: Endgame which has caused a debate among some fans.
On the reason why Captain Marvel’s new look was so inconsistent with her original look, Joe Russo added “This was Brie’s first time playing the character.
She [filmed Avengers: Endgame] before she filmed Captain Marvel, and I think she was experimenting with what the character was.