If the two sides do not agree to the new solution Arias will turn over negotiations to the OAS. It is rather surprising that the U.S. was not able or not willing to put sufficient pressure on the coup administration to force them to sign. Maybe they will at the last moment. Zelaya claims he will return to Honduras agreement or no agreement. If that happens there could be a lot of bloodshed. I doubt that Zelaya will get much support from Clinton.
This is from Bloomberg.
Zelaya, in his interview with Telesur from the Honduran embassy in Managua, said the next step if the mediation efforts fail will be to ask the UN and OAS to help enforce the resolutions they passed unanimously to return him to power and restore constitutional order in Honduras.
He said he plans to meet again with U.S. State Department officials Thomas Shannon and Ian Kelly and Clinton in a bid to bolster support for his return.