Unless it changes with EVs, most manufacturers are on a 6-7 year life cycle, with a mid life refresh.
On that basis I wouldn’t expect any significant changes until the 2023 model year. But, I’m guessing just like everybody else really!
What would I like to see?
Some kind of ‘sport’ version, with better seats. A performance hike for the cooking models would be good, or at least the option for a bit more if you’re not that bothered about efficiency/max miles per kWh.
An all wheel drive version would be good too, but technically more challenging in the ID.3, although I’m sure it wouldn’t take much to accommodate it. I hope they do, and even if my next car isn’t an ID.3 or even a VW, I don’t think you should have to get an SUV to get the benefits of AWD.