Madelyne Pryor
Madelyne Pryor was introduced during the acclaimed 1983 "Uncanny X-Men" run that saw long-time writer Chris Claremont pair with artist Paul Smith for a series of issues that would see the Jean Grey look-alike marry the retired X-Men leader Scott Summers (Cyclops).
Power Girl
Power Girl was introduced in "All Star Comics" #58 in 1976, and was a member of the superhero team the Justice Society of America through the remainder of the 1970s and 1980s period known as the Bronze Age of Comics. Marvel Comics' then-publisher Stan Lee said in 1978 that when DC Comics created Power Girl after Marvel had introduced Power Man, "I'm pretty annoyed about that. ...I've got to ask the Marvel lawyer – she's supposed to be starting a lawsuit about that and I haven't heard anything. I don't like the idea. ... You know, years ago we brought out Wonder Man, and [DC Comics] sued us because they had Wonder Woman, and ... I said okay, I'll discontinue Wonder Man. And all of a sudden they've got Power Girl. Oh, boy. How unfair."