About zero. CEO has already hinted about dropping diesels in favor of EV.
According to the filing, the fix for Gen 3 isn't simply a software upgrade. It's also a OBD monitoring system to make sure the vehicle is in compliance. I'm not sure many people have read between the lines here. So, is the vehicle going to refuse to start if it detects the emissions are out of compliance, like it would if you run out of AdBlue?
Frankly, even if they did bring back TDIs, the technology will only continue to get more complex, expensive, and FRAIL. No thanks.
Plus, why would the EPA/CARB certify new 2017 models for sale, when VW doesn't even have a committed fix for the existing 2015 Gen 3 cars, that might be 2 years away. The answer is they simply won't add to the problem. They have no interest in promoting VWs sales.