Matsui Sakiko and Moriyasu Madoka will not join TEPPEN 2015?

At previous post Matsui Sakiko vs Moriyasu Madoka at TEPPEN 2015 reported AKB48 member Matsui Sakiko and HKT48 member Moriyasu Madoka will join TV show "TEPPEN 2015", but at 28 December 2018 their name were removed from the participant on official web page.
 
Below are screenshot from Fuji TV Teppen 2015 official page:

Participant list Screenshot (Latest updated)

Participant list Screenshot (Previously)

TEPPEN Piano competition participant (updated):

• Aoki Sayaka　
• Sayuri (Katsumi ♥Sayuri)
• Haruna Ai　
• Matsumoto Akiko

Reference:
http://www.fujitv.co.jp/b_hp/teppen/ 

Related post:
Matsui Sakiko vs Moriyasu Madoka at TEPPEN 2015
http://akb48-daily.blogspot.com/2014/12/matsui-sakiko-vs-moriyasu-madoka-at.html