See Julian Ku's post at Opinio Juris about Putin's suggestion that an alternative to the WTO that focused on poor countries should be considered.
Of course, this is not the first time that an alternative to the WTO/GATT has been discussed. For a nice account of the UNCTAD's rather modest role as a threat to the GATT, see Hudec's Developing Countries in the GATT Legal System. The developing countries got little that they wanted in exchange for giving up on replacing GATT with UNCTAD, which was probably a good thing. The question for Putin is what exactly he would change at the WTO.