I was gonna post on the Morocco question, but ChuckS covered that nicely (and my Moroccan friends will attest, bcs many Moroccans know this while very few of us Yanks do).
The never realized African pavillion might some day get a South African sponsor, the way that the Moroccan tourism ministry and Royal Air Maroc do for Morocco. I would think modern sensibilities would mean that it would be the South African pavillion, rather than respresent a whole continent (which BTW includes Morocco).
What I would love to see would be India represented! Tho India does not rely much on foreign tourism (as a percentage of the economy) compared to say South Africa. But hey, India will soon represnt 20% of the World's population, and wow, what a cultural legacy there! Not likely tho.
Perhaps more likely might be Brazil. Wouldn't that be fun! They'd have to doctor any beach photos to expand the suits to American sensibilities - or maybe not, if they want to attract more tourists. And I'd love to have a Brazilian dining option at Epcot. And we really ought to have representation from the second largest economy in the Americas. Tourism is big business in Brazil so perhaps we might actually get a sponsor. Just dreaming here.