According to CBSNews.com, here are the 11 teams returning from many seasons past to shoot for (another) $1,000,000.
Kevin O' Connor and Drew Feinberg (Season 1; Fourth)
Oswald Mendez and Danilo Jiminez (Season 2; Fourth)
John Vito Pietanza and Jill Aquilino (Season 3; Fifth)
The Agus (Season 7 Champions)
The Conleys (Season 10- Sixth)
Charla Baklayan Faddoul and Mirna Hindoyan (Season 5- Sixth)
Rob and Amber- The Marianos (Season 7- Second)
The Pollacks (Season 3-Second)
Eric Sanchez and Danielle Turner (Both were on seperate teams the first time they were on the show in Season 9)
Joe Baldassare and Bill Bartek (Season 1- Third)
Dustin Seltzer and Kandace Pelliter (Season 10- Second)
Notable snubs: Colin and Christie and a ton of winning teams!
This will NEVER be the best list.