Startup Idea : Networked E-Commerce System

At this of a time the only available cooperation among the online shops that sell similar / different produce is through the affiliate programmes - only the Front-End Cooperation. With the increasing consolidation of the e-commerce market, the players would require faster access to the consumers and one of the solution could a Back-End E-Com Collaboration system for re-purchases of goods / renting a slot in small warehouse of a different e-com player (... if e-fulfilment doesnt take over) / etc.