English Grammar in Use 5th Edition by Murphy covers 'shall and will' on the page 44; the book suggests that 'will' is more common in the spoken English and no information regarding the question in the title. However, in an interview on the Guardian conductor Roger Norrington says
These two CDs will doubtless be the last I shall make, after several hundred in so many various genres
I wonder if 'shall' is more formal than 'will'. My question is not specifically about the quoted sentence, but I base it on the aforementioned quote.
Note: I interpreted the sentence as if he will not make any more CDs, hence the final.