http://emymika.tumblr.com/post/17732013684/takahashi-minami-post-12-02-16Someone on tumblr translated her blog post already.
But from what I understand she will not leave the AKB ..
「kaepa」イメージキャラクターに高橋みなみさんを起用伊藤忠商事は、スポーツブランド「kaepa」のイメージキャラクターに、AKB48の高橋みなみさんを起用する。契約は12年春夏、秋冬。メンズ、レディス、キッズカジュアル、シューズの商品群が対象。伊藤忠は、99年からkaepaブランドのマスターライセンシーになっている。高橋みなみさんは、AKB48のオープニングメンバーで、チームAキャプテンとして、人気を集めている。
Takamina could command an idol group, troops in an infantry, or even a Federation starship. Acchan might be the face of AKB48, but Takamina is definitely the motivator and leader. What she does is equally important for the group. Takamina is a winner because she cares. She cares a lot about making sure things are cool in AKB48. It's gotta be a lot of pressure and she rises to the occasion every single time. I really like her for that, as well as for that fact that she herself is a great member. Love her vocals, she performs well all the time, great in No Sleeves, and I'd even dare say she's pretty sexy in her own way. One of AKB48's best and brightest for sure.