I can't imagine such situation either but his schedule is full. He's got a lot of films to work on. Unless he finishes some of the scores early and got time for one more...
or he's on board but just being secretive about it and has figured out his schedule. Fingers crossed.
Oh yes, good point. I'd bet that and Spongebob are finished scoring before 2020 begins.
I hope so but then again look at Dark Phoenix (that hot mess). Hans was supposedly finished with it awhile ago but with all the changes, he might be still working on it till now (According to Hybrid Soldier/Stephane from Hans-Zimmer(dot)com who was asked about not too long ago and said the score is not done yet).