It looks like South Africa will be the next mission for us, and it looks like it is coming soon.
It looks like it will be much like Challenge Mission London and Paris; 3 chapters, collect a consumable item (in this case Counterfeit Tickets) to finish jobs.
There will be one new chapter each week, and 3 chapters total. The first chapter comes out in two days (Saturday night late).
Oh, and make sure you add someone to your Mafia right away - you will be able to collect 10 counterfeit tickets right away and get a little bit of a head start on the collection!