Let's assume that you set that up properly, so that the toggle is flipped only when a particular signed update tells it the address of the replacement contract.

Let's assume that you set that up properly, so that the toggle is flipped only when a particular signed update tells it the address of the replacement contract. Yay! Please put ether into this contract, it will benefit all participants. Later: upload new contract, flip the toggle: all your ether belongs to me. Thanks!