As current rumours from analyst predictions for the next generation of the Apple Watch (Series 4?) state, the next generation of Apple should should most likely fit all current bands.
This is a huge relief for all of us at JUUK! 😅
The one thing that seems to be a common change, and a welcome one, is the the screen will be 15% larger when they slim down the bezels.
Here's one such article for your perusal: https://www.t3.com/news/the-upcoming-redesigned-apple-watch-will-work-with-your-existing-bands