The first potential addition to Mexico's tentative list in 10 years includes the former nomination "Industrial complex of the textile factory La Constancia Mexicana and its housing area" which was dropped from their indicative list in 2013. The new serial nomination includes 8 components. Perhaps this is an indicator of an updated tentative list?Industrial Heritage of Puebla 19th and 20th centuries (Mexico)
If Mexico nominates any part of "Greater Big Bend" in a updated tentative list, for example "Maderas del Carmen", North America might have a 2nd "International Peace Park" emerging soon. Moreover, there are other transboundary nominations that have been discussed directly with the US National Park Service, such as the "Kino Missions".
Big Bend National Park UNESCO Description:"The park serves as the keystone for a group of surrounding large protected areas, including Big Bend Ranch State Park (Texas), Black Gap Wildlife Management Area (Texas), and three protected areas in Mexico: Áreas de Protección de Flora y Fauna Cañón de Santa Elena, Maderas del Carmen, and Ocampo. The Mexican protected areas encompass more than 800,000 hectares, and Big Bend park managers collaborate with Mexican managers on resource issues. The river corridor is also a protected area, designated and managed as the Rio Grande Wild and Scenic River on the U.S. side of the border and Monumento Natural Rio Bravo Del Norte on the Mexican side.*Useful resource about supporters of a "Great Big Bend" International Park, includes maps