EPCOT's 30th Aniversary (October 1st, 2012) is said to be the reason behind a rumored push for a new country at World Showcase. The pavilion is said to be Spain, and would be located between France and Morocco. Tied to this is buzz that there will be an expansion of the Japan pavilion (could this include a ride?), an update/upgrade of Future World's Universe of Energy, and a replacement for the old Wonders of Life.
Sources: Orlando Busines Journal / Screamscape