Writing on the wall is clear. Franchise cricket will take preference over international cricket and then Indian firms will dominate the franchise sector around the world (especially in countries outside the pig-4). It is not just with the upcoming T20 league in South Africa. A number of franchises in CPL, MLC and UAE T20 league are directly owned by the IPL franchises. And I believe that this will be beneficial for cricket. Similar to football, cricket also need to move to a structure that is dominated by the clubs rather than national boards.
Yeah this space is going to change drastically but after 4-5 years during next IPL media rights deal.
The way these franchises are expanding their footprints it seems they will now compete with each other for fixed 4-5 months every year and seriously trying to tap every new market.
Still it will take a long time for other franchise cricket to compete with IPL. Bilateral and trilateral series are already being less frequent. I reckon they will completely end in a few years time. Only ICC trophies will happen for different formats of cricket. This is what has been happening in football for a long time now the same will happen in cricket too.