From this I see his comments as neither confirming he will sign or not.
“I think it's better to stay a bit 'mystery”. Indicates to me happy to stay but wants to keep Bayern in the dark to be able to negotiate a good deal for himself.
Then in answering the question is there a timetable for a decision, he replies..“Then during the winter break I can think more about it".
What is there to think about if he is happy to continue at Bayern, leaving options open, leaving door open for a move.
It hasn’t been mentioned in this thread up to now but he got a hattrick in Bayerns 4-0 midweek win against Mainz!