First of all, this post is not a news, it is just my personal opinion after watching full version AKB48 single 38tj "Kibouteki Refrain" MV, I think this MV tells the history (and future) of AKB48, therefore I would like to share my personal thought with all of you.
2006, it is the underground idol period of AKB48, Takahashi Minami struggled alone as CENTER of AKB48
2006, Maeda Atsuko started to bear the AKB48 CENTER in the single Aitakatta
2008, Matsui Jurina came to AKB48 group family, and being CENTER in the single "Oogoe Diamond"
2011, Shimazaki Haruka as next generation, being CENTER of TEAM 4
2012, Team 4 disbanded, Shimazaki Haruka seems nowhere to go.
2012, Shinoda Mariko, Oshima Yuko and Tomomi Itano gave their hand to AKB48 next generation aces Watanabe Mayu and Shimazaki Haruka.
2012 to 2013, Watanabe Mayu and Shimazaki Haruka tried their best to bear AKB48 next generation ace responsiblity.
2013, Tomomi Itano graduated.
At this period Oshima Yuko struggled alone and fulfilled her ACE responsibility.
2013, Sashihara Rino being AKB48 General Election CENTER, however she was surrounded by scandal and anti.
2013, Kojima Haruna being the CENTER of the single "Heart Ereki"
2014, Watanabe Mayu and Miyawaki Sakura being Double CENTER of the single Kibouteki Refrain