"hoping that the Pacific and Atlantic trading zones one day merge into a new global trading agreement."

Why not work on a new global trading agreement as a goal instead of a possible side effect. Are there features of the plethora of existing agreements that could be incorporated into new WTO rules and regulation? Only from a global perspective can mid sized and smaller nations gain protections for independence and integrity whilst seeking fair trade. The powerful nations and their multinational champions coerce humanity found in smaller countries. Just as we see income disparity in first world countries unaddressed, world comity is being challenged as never before. 

The idea that if you get business right the rest will automatically follow is not unlike the trickle down theory, specious in practice.