There have been controversial costumes over the years. One that sparked enormous controversy well before Halloween 2015 is a "Caitlyn Jenner" corset costume. Despite public outcry claiming that the costume is offensive, popular retailers plan to go full steam ahead with selling the costume; one defending their conviction to sell the costume as a celebration of Jenner.
In 1971, Kamen Rider launched the "Henshin Boom" on Japanese television in the early 1970s, greatly impacting the tokusatsu superhero genre in Japan. In 1972, the Science Ninja Team Gatchaman anime debuted, which built upon the superhero team idea of the live-action Phantom Agents as well as introducing different colors for team members and special vehicles to support them, said vehicles could also combine into a larger one. Another important event was the debut of Mazinger Z by Go Nagai, creating the Super Robot genre. Go Nagai also wrote the manga Cutey Honey in 1973; although the Magical Girl genre already existed, Nagai's manga introduced Transformation sequences that would become a staple of Magical Girl media.
Many new openly gay, lesbian and bisexual characters have since emerged in superhero fiction, such as Gen¹³'s Rainmaker, Apollo and Midnighter of The Authority, and Wiccan and Hulkling of the Young Avengers. Notable transgender or gender bending characters are fewer in number by comparison: the alter ego of superheroine Zsazsa Zaturnnah, a seminal character in Philippine popular culture, is an effeminate gay man who transforms into a female superhuman after ingesting a magical stone. Desire from Neil Gaiman's The Sandman series and Xavin from the Runaways are both characters who could (and often) change their gender at will. Alysia Yeoh, a supporting character created by writer Gail Simone for the Batgirl ongoing series published by DC Comics, received substantial media attention in 2011 for being the first major transgender character written in a contemporary context in a mainstream American comic book.
i would say that that, in the comic book format, the first super-powered character would be popeye, who was capable of superhuman feats of strength by eathing spinach (1929). the same year also provided the comic book format with the first sort of vigilante-crime-fighter, the shadow. the full costumed crime fighter debuted in 1936 with the phantom. you can argue that the first time the medium of the comic book, the costume, and the super powers (not of magical origin - and i make that distinction because science, technology, mutation, etc. are devices that influence literature far more prominently post-industrial revolution, wheras magic and divinity were devices with long histories) were brought together was, indeed, the action comics superman debut issue.
It was a basic convention of comic books at the time of Batman's creation that black needed a highlight color (usually blue) in order to show detail and give the illusion of three-dimensionality. Over time, the initial blue highlight spread out over the previously black cape and cowl to become the dominant color. Thus artists renditions depict the costume as black and gray or blue and gray.
Halloween costumes are costumes worn on or around Halloween, a festival which falls on October 31. An early reference to wearing costumes at Halloween comes from Scotland in 1585, but they may pre-date this. There are many references to the custom during the 18th and 19th centuries in the Celtic countries of Scotland, Ireland, Mann and Wales. It has been suggested that the custom comes from the Celtic festivals of Samhain and Calan Gaeaf, or from the practise of "souling" during the Christian observance of Allhallowtide. Wearing costumes and mumming has long been associated with festivals at other times of the year, such as on Christmas. Halloween costumes are traditionally based on frightening supernatural or folkloric beings. However, by the 1930s costumes based on characters in mass media such as film, literature, and radio were popular. Halloween costumes have tended to be worn mainly by young people, but since the mid-20th century they have been increasingly worn by adults also.