Duos - For the first couple weeks of the game, the houseguests will be playing in duos. When a houseguests wins HoH, their duo partner is immune (likewise for the person who wins the Power of Veto). The HoH will nominate two duos for eviction. For the eviction, the remaining houseguests would vote out one person from each duo, and the remaining members from those duos would form a new duo.
Prize Money - If both members of a duo make it to the Final Two, instead of the winner receiving $1,000,000, the winner would win $2,000,000.