The latest issue of 月刊テレビナビ (Gekkan TV Navi) that covers 8/27 to 9/30 has the following under September 17th:
The blurb under it says 内容は未定 (naiyou wa mitei) which means details are pending. What details? Probably the names of whoever made it to the competition and the announcers and TBS trying to do some sort of foreshadowing that if you read closely enough gives away the ending or something.
September 17th! 6:55 to 10:48! Be there or be square!