The $200million estimate comes from some analyst who also happened to report a buy rating for the game developers stock. Otherwise there doesn't seem to be any other sales analysis. Bloomberg estimates revenue for the developer could rise as high as $160million, though that is with a host of other titles as well.
And it's not hard to imagine that very little of that money would actually make it's way back to the Kardashian family, who probably weren't involved in funding and simply licensed out the name and voice work