First to say, Russia west of the Ural Mountains is absolutely massive. Imagine driving from St. Petersburg to Chelyabinsk. It still would feel like forever even in a 1:20 scale. If SCS is afraid of Texas, imagine Russia. I think simply it will be several DLCs in a matter of five years the least.
The world comes to SCS in a 1:20 scale. That gives me a few questions. Will they merge it into one game? ProMods in North America could build Mexico, Central America, and Canada by the time ATS gets finished with the supposed last map DLC, New England. I think by that time they can build the Greater and Lesser Antilles. ProMods can also build Alaska, imagine driving from Vancouver to Anchorage with the winter mod. Hmm. However, will they add Greenland and the tons of frozen acres of Nunavut? Also hmm.
I swear, I heard ProMods thinking of building Asia. I'm not even sure if Asia will officially be announced by Pavel within the next ten years. Continents like Asia, Australia, and Africa would require more filler land as well as topography details, imagine driving past the Himalayas on Route 318. Pretty much if they got at least a thousand developers to build both China and India, I think the countries could release in under three years. And of course, the filler land, mostly in the Tibetan Plateau and Siberia. In Africa, building the Sahara would just mean adding more and more sand until you have the size of a whole ATS or even more. It might be tiring, and adding all the jungle.
And Australia, pretty much the same. South America would be the last continent, but won't be accessible from ATS territory due to the Darien Gap.
I know, this is probably SCS's dream, and it's probably never going to happen.