I can't really tell.
Here's another set of speculated contestants that is posted in survivorfever.net
Males:
Rupert Boneham - Survivor: Pearl Islands and All Stars
JT Thomas - Survivor: Tocantins, winner
James Clement - Survivor China, Survivor: Micronesia
Tom Westman - Survivor: Palau, winner
Colby Donaldson - Survivor: Australian Outback, Survivor: All Stars
Coach Ben Wade - Survivor: Tocantins
Tyson Apostol - Survivor: Tocantins
Randy Bailey - Survivor: Gabon
Rob Mariano - Survivor Marquesas, Survivor: All Stars
Unknown Male: Survivor: Samoa ?
Females:
Stephenie LaGrossa - Survivor: Palau, Survivor: Guatemala
Sugar Smith - Survivor: Gabon
Amanda Kimmel - Survivor: China, Survivor: Micronesia
Candice Woodcock - Survivor: Cook Islands
Jerri Manthey - Survivor: Australian Outback, Survivor: All Stars
Courtney Yates - Survivor: China
Danielle DiLorenzo - Survivor: Exile Island
Parvati Shallow - Survivor: Cook Islands, Survivor: Micronesia
Sandra Diaz-Twine - Survivor: Pearl Islands
Unknown Female - ? (Picture speculation on the same site showed Natalie Bolton)
No Ozzy.
But what are the chances Courtney would accept to be in Survivor again? That's just shocking for me.
And I find it unlikely to cast Samoan castaways. They won't have enough time to recover.