During the "Under Siege" storyline, Janet leads the team during a time where they are attacked from all sides. She defeats Titania and the Absorbing Man, then leads a team against Baron Zemo's forces to rescue Captain America, the Black Knight, and other team members who have been captured. Shortly after the resolution of this story, she steps down from leadership once more, succeeded by Monica Rambeau in that position. After leaving the team, she battles the threat of Red Ronin by herself. She later joins the West Coast Avengers. Initially, she still acts as though the team leader, to the chagrin of other West Coast Avengers who desire that role. During this time, she resumes a romantic relationship with Hank. Although she is elected as a regular member of the Avengers West, Janet chooses to become a reserve member.