 The character has been associated with several superhero teams in the Marvel Universe, including the Avengers, the Defenders, the Champions, S.H.I.E.L.D., and the Thunderbolts.She has appeared in many other forms of media, including the major motion pictures "Iron Man 2", "The Avengers", "", "", "", "", "" and the upcoming "Black Widow", wherein she is portrayed by actress Scarlett Johansson.Yelena Belova is the second character to take on the Black Widow codename in the modern mainstream comics who debuted briefly in "Inhumans" #5 (March 1999) and was fully introduced in the 1999 Marvel Knights mini-series "Black Widow".