some superman villains you think have great potential,but never get develop

[scary harpy]

Superman foes who had some potential (imho)...

• Atoman (Mutual radio 1945; Superman foe) - soldier injected with kryptonite by Nazi scientist determined to get revenge after Germany's defeat; fingers emit green lightning.
• Colonel Future (Action #484)- Col. Edmund H. Future, constructor of the Mechanical Marauders, leader of the C-F Gang.
• Funny Face (Superman #30?) - comic-strip characters brought to life.
• Mala (Superman #65) - evil Kryptonian, accompanied by brothers Kizo and U-Ban.
• Mr. Sinister (Superman #16) - malevolent purple-skinned alien from fourth dimension; speaks in rhyme; uses scientific machinery to kidnap buildings from Earth; high-tech weaponry.
• Wizard of Wokkit (Action #86; Superman foe) - sorcerer.
• The Warlock [The New Adventures of Superman; 1966, Filmation]
• The Sorceror [The New Adventures of Superman; 1966, Filmation]

Some Superman foes who be a better fit for Nightwing (imho)...

• Aesop, Johnny (Action #75) - gang leader who commits crimes based on Aesop's fables.
  
• The Archer (Superman #13) - Quigley, green-clad famous big-game hunter; uses archery for theft & extortion.
  
• The Domino (Action #46; Superman foe) - handsome but profligate society playboy Jeff Farnham; dons purple mask and intimidates amusement park
• Hi-Jack (Superman #25) - debt-ridden banker Jack Jackson dons green and purple costume with a jack of spades on his chest to commit crimes.
• Jim Dandy (Superman #107) - dapper leader of criminal gang.
  
• the Leopard (Superman #20) - Sam Kennedy, publicity man for the Cosmos Circus, dons leopard's-head mask and commits crimes involving big cats.
• Mr. Ohm (Superman #51) - devises a flying electro-magnet to rob armored cars.
• Mother Goose (Action #110; Superman foe) - nursery rhyme-based crimes.
  
• Night-Owl (Action #53; Superman foe) - scientist; bald, with pointy ears; performs darkness experiments which allow him to see in the dark; has "black light projectors" and pet owl with poison-dipped claws.
• Prankster (Action #51; Superman foe).
• Puzzler (Action #49; Superman foe) - murderous game player, particularly with playing cards.
  
• Scarlet Widow (Mutual radio 1945; Superman foe) - steals Kryptonite from Metropolis Museum.
• scientist, nameless (Fleischer Studios 5/15/42; Superman foe) - American Indian scientist with underwater base who generates an "electric earthquake" unless Manhattan Island is returned to its native inhabitants.
• Spider Lady (Columbia Pictures 1948; Superman foe) - blonde in black mask and evening gown, has big electrified spider web in hideout; attempts to steal "reducer ray"
  
• The Tiger Woman (Action #195; Superman foe) - one-eyed bandit leader who is a perfect look-alike for Lois Lane.
• Toyman (Action #64).
• The Water Sprite (Action #82; Superman foe) - Kenneth Darby disguises as hideous green monster as part of elaborate scam.
  
• Zoltan (Mutual radio 1945; Superman/Batman foe) - runs Zoltan's Wax Museum as listed in phonebook; encases Allied scientists in super-hard "wax-alloy" and smuggles them overseas where they will be forced to work for the Axis.

[marhawkman]

Wouldn't the kryptonite radiation harm the Archer? Or are humans immune now?

I ask because I remember Lex lost a hand because of the kryptonite ring he wore.

Well a lead lined quiver would limit exposure. Also it takes months or years.

[TheRay]

It wouldn't even be too hard to revamp, just give him Arrow heads made of or lined with Kryptonite. It's a pretty easy fix and, if Superman got too close, the Kryptonite on the remaining arrows would begin to weaken Superman and The Archer could use them as knives in close quarters.

I like that idea but just to keep him away from being called an evil Green Arrow, I’d say that in addition to those arrows The Archer has some unknown arrows that can do damage to Superman. He has experience as a big game hunter and Superman is big game for any villain.

[The One and Only]

I like that idea but just to keep him away from being called an evil Green Arrow, I’d say that in addition to those arrows The Archer has some unknown arrows that can do damage to Superman. He has experience as a big game hunter and Superman is big game for any villain.

He could always use enchanted or magical arrows. With the Man of Steel's sensitivity to magic, it could be an alternate route to kryptonite.