At the beginning The Avengers 2: Age of Ultron, the Avengers are
attacking a Hydra base to retrieve Loki's sceptre. Taking advantage of the chaos, Scarlet Witch, a Hydra member, uses her power of telepathic suggestion to play on Tony Stark's fear of a new attack on the Earth by aliens and push him to use his intelligence to develop a dangerous weapon.
Indeed, it is discovered that the
heart of the sceptre is a powerful super-computer, and Tony Stark, with the help of Bruce Banner and J.A.R.V.I.S, uses it to develop the artificial intelligence he always dreamed to protect the Earth.
everything goes wrong, and the new AI, under the name of Ultron, turns against its creators and decides to destroy mankind.
My question : what was Scarlet Witch's original plan?
She clearly intended to kill the Avengers to exact her revenge (her parents were supposedly killed by S.H.I.E.L.D./Avengers).
But her intention was not
the destruction of mankind, since she joins the fight of the Avengers at the end of the movie. How did she know that Ultron would turn itself against Stark and the Avengers? Did she only rely on the fear of Tony Stark of a new invasion and his lack of sense of precaution when it comes to create new technology?
It doesn't seem to me that her actions are part of a greater plan by
Hydra: Hydra's leader clearly hesitated to use the power of Quicksilver and Scarlet Witch during the attack and the two siblings took advantage of the chaos of the battle to follow their own agenda.