Going to make a wild guess today for when the "Scorpio Micro" will happen, am thinking: late 2020 or earlier it will ship! (fingers crossed)
Sound Devices was impressive in pushing out heaps of MixPre recorders quickly. But if we ignore the M variants, as they're just "small" differences, then they had three: 3 / 6 / 10T.
The last of them was the MixPre10T, which has a roughly year and half gap between the 10T shipping and when Scorpio will ship.
Thus if we figure out a similar product development cycle for the next big release then this will come in late 2020, which is roughly a year and half from now.
However hopefully the product development for a "Scorpio Micro" will be faster than making the Scorpio from scratch (which is totally different to the MixPre10T which came just before it!), so maaaaaybe we can see a Scorpio Micro at NAB 2020? ;-)