This is a list of all seasons that had returnees considered
Pearl Islands
Michael Skupin (Cut for Savage)
All-Stars
Brian Heidik (Declined)
Colleen Haskell (Declined)
Elisabeth Hasselbeck (Declined)
Hunter Ellis (Declined)
Jonny FairPlay (Declined)
Neleh Dennis (Cut
Rodger Bingham (Cut)
Sandra Diaz-Twine (Declined)
Michael Skupin (Offered)
Sean Rector (Cut)
Vecepia Towery (Offered)
Heidi Strobel (Declined)
Guatemala
Hunter Ellis (Declined)
Jonathan Libby (Considered)
Michael Skupin (Considered)
Rodger Bingham (Considered)
Wanda Shirk (Considered)
Panama
Michael Skupin (Offered)
Fiji
Michael Skupin (Offered)
Micronesia
Coby Archa (Considered)
Courtney Yates (Declined)
Peih-Gee Law (Cut; Replaced by Amanda Kimmel)
Sandra Diaz-Twine (Cut)
Shane Powers (Considered)
Richard Hatch (Request Denied By Federal Judge)
Terry Deitz (Considered)
Michael Skupin (Offered)
Tom Westman (Declined)
Twila Tanner (Considered)
Yuk Kwon (Considered)
Tocantins
Michael Skupin (Offered)
Heroes vs. Villains
Ace Gordon (Cut)
Alicia Calaway (Declined)
Amy O'Hara (Cut; Replaced by Candice)
Brian Heidik (Considered)
Corinne Kaplan (Declined)
Danni Boatwright (Declined; would only do all winners)
Hunter Ellis (Declined)
Erik Reichenbach (Considered)
Jonny FairPlay (Uncertain; Claims he was considered)
Jonathan Penner (Cut; Claims him and Shane were replaced by Russell)
Michael Skupin (Considered)
Natalie Bolton (Cut)
Ozzy Lusth (Considered)
Richard Hatch (Considered)
Rudy Boesch (Considered)
Shane Powers (Cut)
Shii-Ann Huang (Declined)
Sierra Reed (Declined
Taj Johnson-George (Declined)
Terry Deitz (Considered)
Twila Tanner (Cut)
Yau-Man Chan (Declined)
Yuk Kwon (Considered)
Redemption Island
Richard Hatch (Request denied by Federal Judge)
Erik Reichenbach (Considered)
Michael Skupin (Offered)
South Pacific
Ethan Zohn (Declined)
Jenna Morasca (Declined)
Shane Powers (Considered)
Jeff Varner (Cut)
Alina Wilson (Cut)
Philippines
Colton Cumbie (Cut)
Stephenie LaGrossa (Declined; According to Coby Archa, Stephenie was considered when it was supposed to be a Redemption styled season with female returnees, but she declined due to her pregnancy)
Caramoan
Matt Elrod (Declined)
Shambo Waters (Declined)
Lisa Whelchel (Considered)
Tyson Apostol (Considered)
Christina Cha (Considered)
Colton Cumbie (Considered)
Terry Deitz (Considered)
Peih-Gee Law (Considered)
Grant Mattos (Considered)
Troyzan Robertson (Cut)
Blood vs. Water
Ashley Underwood (Cut; her partner and back up partner couldn't make it)
Bobby Jon Drinkard (Cut)
Tom Westman (Declined)
RC Saint-Amour (Cut)
Jamie Newton (Considered)
Jerri Manthey (Declined)
Greg Buis (Declined)
Lex van den Berghe (Declined due to the production of Family Beef)
Tom Buchanan (Declined due to the production of Family Beef)
Where did you her that Erik was considered for HvV and RI, and were did you here that Christina, Colton, Terry, Peih-Gee, and Grant were considered for Caramoan?
Jenna Morasca was invited back for Heroes vs Villians but declined because Ethan (whom she was dating at the time) was in cancer treatment. Jenna also said Ethan was invited back but obviously couldn't participate.
http://mcaf.ee/ojnw3