List of comic book supervillain debuts

Columns: Character / Team | Year Debuted | Company | Creator/s | First Appearance
Nero | 2001 | DC | Judd Winick , Darryl Banks , Mark Bright | Green Lantern Vol . 3 # 132 | Black , White Bandit | 2001 | DC | Dave Gibbons | Batman : Gotham Knights # 12 | Blacksmith | 2001 | DC | Geoff Johns , Ethan Van Sciver | Iron Heights | Double Down | 2001 | DC | Geoff Johns , Ethan Van Sciver | Flash : Iron Heights | Girder | 2001 | DC | Geoff Johns , Ethan Van Sciver | Flash : Iron Heights | Murmur | 2001 | DC | Geoff Johns , Ethan Van Sciver | Flash : Iron Heights | Cicada | 2001 | DC | Geoff Johns , Scott Kollins | The Flash v2 , # 171

Example questions:
In what 2000s comic book did the supervillain character based on the Queen from Snow White first appear ? | Who created the 2000s comic book supervillain character portrayed by Marco Grazzini in the second season of The Flash ? | To what company does the 2000s comic book super villain character created by a 1994 contestant on MTV ’ s Real World belong ? | In what year did the 2000s comic book supervillain character created by the writer known for the Atticus Kodak series debut ?

Answers:
JLA # 47 | Geoff Johns | DC | 2000