Star Sapphire is the name of several characters in DC Comics - most notably Carol Ferris - who often cross the line between being both superheroines and villains. They wear violet-coloured rings that are essentially the same as the green ones worn by Green Lanterns, which provide wielders with powers like flight, energy blasts, the ability to augment their physical statistics and the ability to create powerful constructs of anything they can think of.
Witchblade first appeared in Top Cow Comics – an imprint of Image Comics – in 1995. Witchblade isn't actually a character in itself, so to speak - it's actually a sentient supernatural artifact, in the form of a gauntlet, which bonds to its (strictly) female host (the most well-known being NYPD homicide detective Sara Pezzini), providing said host with a variety of powers and a very skimpy costume (in essence, they become the Witchblade as a result).
Another Detective Comics character, Halle Berry plays Patience Phillips who is murdered and then brought back to life to become Catwoman. The character acquires cat-like abilities and is on a look-out for her murderer in the film. Berry won the Golden Raspberry Award for Worst Actress in 2005 for Catwoman and accepted the award in person, one of few people to do so.
However, when Wolverine was then chosen as one of the main characters in the All-New, All-Different X-Men to debut in Giant Size X-Men #1, Marvel turned to Gil Kane, who had become a go-to cover artist for Marvel in the mid-1970s, to draw their cover debut. Kane looked at Wolverine's costume and decided to add a cowl to his face mask rather than the whisker look that Romita had on the original costume. Dave Cockrum had drawn the original costume throughout the issue, but after he saw the Kane re-design, he liked it so much that he went back and re-drew it all the way throughout the issue. Almost five decades later, that Romita/Kane design still stands out as Wolverine's most commonly used costume.
The hero doing the punching was courtesy of a clever design by Joe Simon, who took the concept of the red, white and blue split of the American flag and worked all three colors into the design of Captain America, giving him chain mail in the process to give him a bit of a classic knight design. Few superhero costumes have remained quite as unchanged as Captain America has for nearly eight decades now, with the only changes mostly been adding things like military belts and the like.
When he was originally working on Batman for National Comics, artist Bob Kane was thinking of the character as being a brighter hero, with a costume that would have bat-wings. Eventually, Kane brought in writer Bill Finger to work on the character idea and Finger explained to him that they should go the other direction. Finger was a big fan of the shadowy pulp fiction hero, the Shadow, and Finger felt that they should take the character into the shadows with a dark costume and a cape and a cowl to make him look more like a bat. Kane agreed and Batman was born.
By the end of the 1940s, superheroes had lost a lot of their appeal to the public. National Comics (now DC Comics) went from having dozens of superhero titles to only having a handful. Most of the members of the Justice Society of America fell out of sight in the world of National. Flash and Green Lantern went from appearing in multiple titles to not appearing in any books at all!