I don't see it. With the current unrest in all around the Sahara, Africa is not an option in the foreseeable future.
Europe just doesn't have that kind of open terrain. The Central Europe Rally in '08 was a disaster with 3-4 days consisting of running the same gravel tracks on military testing grounds over and over. Everybody apart from Carlos Sainz hated it.
The interest in Europe (Spain, France and the crazy Dutch) is there anyway, no matter where in the world it is run.
North America is very unlikely due to land use issues.
Central Asia might be an option.
South America still makes the most sense. Stunning scenery, stable politics, crazy fans and an a good market for Honda and Spanish sponsors.