The 90s were extreme. No costume, no matter how iconic, was safe.
Superman:
(first a mullet)
(and then Electro)
Batman:
Spider-Man
(Better than what he originally wore I suppose)
Wolverine
Hulk
The Avengers
I could go on, but I will let others post their favourites. I don't think there was ever a decade in comics that ignored the "If it ain't broke, don't fix it" advice more than the 90s.
Superman:
(first a mullet)
(and then Electro)
Batman:
Spider-Man
(Better than what he originally wore I suppose)
Wolverine
Hulk
The Avengers
I could go on, but I will let others post their favourites. I don't think there was ever a decade in comics that ignored the "If it ain't broke, don't fix it" advice more than the 90s.