Planning across borders in a climate of change and yawning fiscal austerity lends significant pause to considering border permanence and value, and the challenges of sustaining wellbeing in re-bordered domains. The historic and contemporary actions of cities to reorder metropolitan city-regional borders have ecological, economic, socio-political, and cultural resonance warranting closer local and comparative attention. As part of a book addressing the present and future implications of planning across borders and public policy repercussions, this chapter examines re-bordering local government municipalities into super-cities, and analyses key implications for planning, policy and community especially as the super-city solution is more widely adopted. Accordingly, attention is given first to the typology of generational super-amalgamations that rescale and rewrite globally-circulating best practice in re-bordering urban governance.