As I am about to start a Lucha Libre Hero game set in Vibora Bay I thought I'd share my ideas on why it became synonymous with Masked Wrestlers
It all begins with Therakiel falling from Heaven and crashing through the San Sebastián swamp, when he awakens it's the 1930s and he begins to study the humans in the city and he realises that there will be no bystanders in the forthcoming final battle between Heaven and Hell, as all humans must choose to side with either Light or Darkness, so to understand how they would respond he created a culture where there are no grey areas Lucha Libre, and empowered individuals with great fight abilities.
So in my campaign all of the Heroes in Vibora bay are Luchadores, and the Villians are all totally evil,
Black Mask, Doctor Ka, Brother Thunder all become Luchadores, Sister Rain and Juryrig are supporting characters (Voodoo specialist and Scientific consultant)
Cirque Sinister ( may end up as evil luchas-still working on them)
Serpentine, Mr Gemini, Deadman Walking, Al the Alligator Man (all Luchas)
no supers from other locales come to Vibora Bay (Therakiel's power keeps them out, he doesn't want to pollute his experiment)