I don't think the submission will happen in December either. It will ultimately happen in Q1, 2024. This is what I predicted almost 6 odd months ago when Thermo and all the pumpers were forecasting a late spring/early summer submission.
The management has been lying to us all this while. They have been intentionally delaying the submission because of some reason (which none of us know, but my predication has been around combo data). If 3 years post data lock is not enough to be fully prepared for regulatory submissions then I don't know what is. Particularly when they have outsourced all or bulk of the work to experts! ;)
Wait until December for another excuse to show up.