Okay, but let me suggest to you a thing:

A trailer set to Tili Tili Bom, sung by Scarlett Johansson, and it opens with a little girl with red hair standing in front of a burning house (how Natasha’s parents died) with her hand in an older man’s.  The trailer is shots from the Red Room–not quite normal; for example, the little girl comfortably asleep in a bed and handcuffed to the frame, the little girl on a jungle gym and doing impossible moves, the little girl with other girls all dressed alike and emotionless, the little girl walking down a hallway past a man with a metal arm and blank blue eyes–interspersed with shots of the little girl in ballet school (Natasha’s fake memories).  As the trailer progresses, the shots of the ballet school become dimmer and the Red Room becomes brighter, until the last scene of the little girl doing ballet (performing a brise, meaning ‘broken’) fades completely to black and it cuts to her standing in a brightly lit training room, looking down at something and holding a bloody knife.  The camera pans down to show the hand of another little girl–the last contestant for the Black Widow, save Natalia Romanova standing over her.

Roll title card.