Take this with a grain of salt, but it is rumored that the BB15 twist is 9 pairs of family members (they don't know that they are family members, similar to the Donatos, or S5) Also, similar to last season, they will be split in to teams by a returnee. The returnees are selected by the top of each aspect of the game. (Strategic, physical, social.) They also start already in the game, unlike last season.
