It looks like they are starting out with 20 contestants so the initial teams can be 5 family pairs [where you have coalitions of families not individuals], or returnees versus their family members [Favs vs Fams], or 5 returnees on each team paired with the 5 family members of the 5 returnees on the other team.
I think this creates more of a soap opera effect which is what they are looking for.
A Recap of the season:
http://truedorktimes.com/s26/recaps/e14.htm
Will the producers learn anything from it???