The WTO recently held a Public Forum titled "Is Multilateralism in Crisis/" where various stakeholders met to discuss the future of multilateralism and future of global trade rules. The details of the Public Forum are found here with excellent audios.
I found this presentation by Richard Baldwin (I have blogged about his works here and here) particularly interesting. He speaks about the future of WTO in terms of WTO 2.0 which has to recognize the realities of global supply chains and regional and bilateral trade agreements. For the WTO to be relevant he calls for it to multilateralise supply chain rules or become an insignificant player by 2020.
Some food for thought?