This is from a pretty reliable source over on Sucks.
It'll be called "Survivor: Plus One". Returning players against their families
The cast is:
*SPOILER*
*SPOILER*
*SPOILER*
Aras and his brother Vytas
Gervase and his nephew EG (His family member isn’t confirmed 100% yet)
Rob C. and his wife Nicole
Rupert and his wife Laura
Tyson and his girlfriend Rachel
Kat and her cousin Robby (It MIGHT be her boyfriend Hayden, the winner of BB12)
Laura and her daughter Ciera (Laura from Samoa)
Monica and her husband Brad (That’s right, Monica from One World)
RC and her dad Craig
Tina Wesson and her daughter Katie
So the returning players are rumored to be Aras, Gervase, Rob C., Rupert, Tyson, Kat, Laura, Monica, RC, and Tina
And the family members are more tentatively Vytas, EG, Nicole, Laura, Rachel, Robby, Ciera, Brad, Craig, and Katie