We haven't a firm one yet - we're working on scoping and prioritizing. It's a part time project for everyone involved for now so things move slowly. The very high level one is:
1. Fix all outstanding bugs in CfD/Skiko that we consider blockers (e.g., font loading in Skiko, some Swing interop woes, etc) — we're already on this, at least on filing those issues
2. Implement a library of basic components that can display both old and new UI themes correctly (which ones is TBD depending on prioritisation, beyond the obvious buttons/labels/text fields, etc) — some work is already underway courtesy of @HIGAN, with even more to come once the New UI specs will be published I suppose
3. Have a bridge between the Swing LaF and the Jewel theme so when you're running in a plugin, the Compose UI blends in with the rest of the Swing UI — we had a prototype but we need to flesh it out
4. Refactor the code to look more consistent with itself and with the best practices as adopted in other themes such as Material
We need to find more folks willing to use and contribute to the library, because we're struggling to push it forward due to our "main work" taking priority in the past month or two