I think Tim is retired so a new Finn Brothers album is not happening. I also think Crowded House has more music in them, but Neil seems to want to hold off going back to that well.
Remember that Neil averages one album every 35 months. Lightsleeper and Pajama Club were certainly exceptions to that rule, but otherwise he's been VERY consistent. We're only 5 months out from the release of Lightsleeper, so I think we've got another 30 months to go.
I think there's a 50/50 chance that Neil will release either a new solo album or a Crowded House album in 2021.
All that being said, Neil does tend to release something every 20 months, even if it's not a full new album. So we might see *something* in 2020.