It may be that it is just easier to have the first two elections that the City elect four Councillors and the District elect four in their old boundaries and of course one Mayor elected by the whole new municipality. There is more work to do than worry about politicians.
It has been suggested a Citizen's Assembly be stuck to develop the Amalgamation Plan to stick the main goal, to do this in way that saves serious cash. This way would remove politicians and civic staff from the process of developing the plan but at the end of the day, the two Councils would have approve the plan and put it a referendum of the voters.
In the most optimistic scenario we will not see an united North Vancouver until 2020.