Two simultaneous WnC brackets could be held; every time a team loses, it switches place with the losing team in the counterpart bracket. This seems effective if there are only two or three people in each team. Two matches every round makes commentating busier (an incentive to increase time controls. By the end, two teams will be left in the "final" match (may be a positive for some).
(As noted earlier, it seems to be best if there are two in each team. Easier to organise, as well