Dozens of United Nations employees protested at the organisation's headquarters in New York City on 21 October - the day of the character's appointment - when DC Entertainment president Diane Nelson said the campaign would feature various initiatives "over the course of the next year".
Almost 45,000 people signed an online petition asking UN Secretary-General Ban Ki-moon to reconsider selection of the buxom character, typically clad in a red, white and blue body suit. Spokesman Jeffrey Brez told the news agency that previous United Nations initiatives with fictional characters have had short runs.
At issue was Wonder Woman's sexed-up, tarty reputation-the skin-bearing suit, the thigh highs, hardly an empowering getup, opponents of the appointment argued, especially when the task at hand is to fight the sexual exploitation of women.
The selection came in celebration of Wonder Woman's 75th anniversary as a DC Comics superhero.
The move follows an online petition that called for the removal of the DC Comics icon after her October 21 appointment, citing her costume and body as reasons for her inappropriateness as a figurehead of empowerment for young girls.
On Monday, after months of protests about the designation, news broke that Wonder Woman's tenure as ambassador would be coming to an end on Friday.
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The wedding ceremony took place in Los Angeles last week and the actress looked extremely handsome in traditional attire. The bride stunned in a pink and golden lehenga, and the groom looked dapper in cream and golden kurta with red turban.
"It is alarming that the United Nations would consider using a character with an overtly sexualized image at a time when the headline news in United States and the world is the objectification of women and girls", reads the petition.
Wonder Woman masquerades as an army nurse by the name of Diana Prince, but her critics said her image is not at all culturally sensitive.
DC Entertainment told Reuters the company was happy with the Wonder Woman campaign highlighting empowerment and gender equality for women. Her own movie - titled Wonder Woman - will be released in June 2017.
Wonder Woman was created by William Moulton Marston, who also helped invent the polygraph "lie detector" machine and was an afficionado of bondage and submission roleplay - what's now known as BDSM.