[Redmond]

Could work like that. But I'm thinking the teams will compete against each other each week for immunity, the winning team doesn't have to nominate or face eviction that week. The losing team has to nominate within their own group, the two or more housemates with the most nominations will face the public vote.

Also as the series goes on, housemates could switch groups or be put into the other group as a mole etc. It could be good.