User blog comment:King Flurry51/Mal and Scarlett:analyzis of their values and vices as villains/@comment-24971793-20140821131423/@comment-24971793-20140821160807

Agreed, the other villains have a backstory while Mal and Scarlett are just "born evil" as far as we know. But that makes them a bit "cartoony"/irrealistic IMO. Supervillains with zero sense of morality are fictional creatures.

Mike/Mal can return storywise. But because of the backlash from the fanbase I doubt that the creators would take the risk of bringing him back.

Scarlett could indeed return in disguise, or perhaps with Max as a duo in ridonculous race which has a different host (Although I'll doubt it since only a handfull contestants will return, but maybe season 2). Or they could slightly alter her personality from "supervillain" to conniving evil nerd, in "three zones and a baby" when she and Max got split up she was focussed on the competition, so she does have that competitive game focussed side in her. Scarlett's overall goal was to get the pricemoney, she took over the island cause she saw it as an easier and faster way of getting the money then to continue in the competition.

Not many contestants from Pahkitew show much potential to return, they're either too gimmicky (Leonard, Rodney) or got a satisfying rounded ending (Jasmine). So I think out of that cast Scarlett is one of the more likely characters to return.