I wouldn't mind if they brought certain people back for a third time. I wouldn't even mind an actual "Third Chance Survivor" or "Last Chance Survivor", with only 3rd chancers, as long as they did it only once, at the very end of the series (maybe the 2nd to last season before having an all-winners season), and assuming that they'd only bring back people who haven't won. Also, if they bring Rupert back, he'd have to agree to half prize-money to make up for the totally undeserved $1,000,000 he got from that idiotic America's Tribal Council thing. Here's some people I'll like to see:

Potential Third Chance Survivors

Ami Cusack
Cirie Fields (if she doesn't win this season)
Eliza Orlins
Jonathan Penner
Jonny Fairplay
Kathy Vavrick O'Brien
Ozzy Lusth
Parvati Shallow (if she doesn't win this season, but I think she will)
Rob Cesternino
Rob Mariano
Rupert Boneham (only if he agrees to half prize money)
Stephenie LaGrossa
Yau-Man Chan
Etc.

I'd also love it if they did a "Second Chance Survivor" (with early boots) or another ASS. If they do another ASS though, they really need to divide the players into four tribes based on placement in their original seasons, that way the people who did well in their original seasons won't be immediately targeted.