The obvious answer is a 30th anniversary rerelease of "Achtung, Baby!" Possibly the JT30 tour will finally get a live film release, it would be cool to have some footage from the JT2019 tour added to the already existing JT2017 tour film.
I do hope that they have spent down time in 2020 writing and perhaps recording. New music in the new year would be welcome but I don't know how likely that would be. Perhaps they'll spring a surprise album on us similar to the unexpected SOI.
All in all.... who knows? There will be no tour in 2021, that's the one prediction I feel comfortable making