2008 was the only year where Morning Musume had no changes (Graduation, New members)
Considering this, I wouldn’t be surprise if 2016 have some kind of change (Graduation) as well
I just don’t see them keeping things the same for more than a year
But, First Sentai Black Leader 19 years see: in Ranger Wiki
Kouichirou is the president of the "Digital Research Club" of Moroboshi High; he was one of four students (alongside fellow students Shun Namiki, Chisato Jougasaki and Miku Imamura) investigating strange occurrences and technology being created at the NASADA plant in connection to the works of I.N.E.T., unknowing that Kenta Date, a fellow student, had already been recruited for their research. When the Nejireija began their invasion pre-emptively, the four students and Kenta were all given Digitizers and the task of becoming Megarangers in order to battle the invaders from the twisted realm.
The Twisted Invaders After the five became Megarangers, Kouichirou invited Kenta to join their club due to their current common connection, even though his grades are lacking.
Since the first creation of Hello! Project and Morning Musume's first single, and the merger of One-Up Music and J.P. Sounds in 1998, the same year also have Morning Cop ~Daite HOLD ON ME!~, Morning Musume and Heike Michiyo's first film, Morning Musume Tsuika Audition, to led the 2nd generation members, Yuko Nakazawa debuted as a soloist, and the first Hello! Project live, titled Hello! First Live at Shibuya Kohkaido. And 9 years after, Asami Kimura and Saito Miuna graduated from Country Musume and Hello! Project, Morning Musume Tanjo 10nen Kinentai is formed, Linlin started as Hello! Pro Egg, Canary Club is formed, TNX is formed, and Ami Tokito started collaborating with THE Possible, Ai Kago was fired from Up-Front Agency, Junjun and Linlin joined Morning Musume as 8th generation, replacing Hitomi Yoshizawa and Miki Fujimoto, the two last member of Golden Era, NICE GIRL Project! is created, Gyaruru and Pabo was formed, Asami Konno returns to Hello! Project, Ongaku Gatas was formed, and the Hello! Project 2007 Shinjin Kouen Dai 1kai ~Saru no Koku~ / ~Tori no Koku~ was celebrated, and the next 9 years....there's a gold present, like a special unit by Juice=Juice, titled NEXT YOU, will performing Next is you! / Karada Dake ga Otona ni Nattan ja nai, the single that will serve as the theme song for the 2016 TV drama Budokan, starring the members of Juice=Juice. But, there's a bad news like Kanon Suzuki graduates from Morning Musume '16 and Hello! Project, and Meimi Tamura graduates from ANGERME and Hello! Project. Also, 2016 adds the film Shuriken Sentai Ninninger vs Toqger the Movie: Ninjas in Wonderland featuring the casts of Shuriken Sentai Ninninger and Ressha Sentai Toqger, plus the first cameo appearance of Doubutsu Sentai Zyuohger.
The Great Gold Nine Consecutive Years which every years which can divisible by 9, will distracted. Also, Ai Kago was fired from Up-Front Agency, Nine years after Budokan premieres on Fuji TV on February 2016.