That's great for her! Everyone loves that kid (i mean, the Egg&Gatas fans) so it's great for her. Though this is kinda soon ;, it's a great oportunity for her.
I'm definitely not a fan of her at all. I think she's WAAAAAY overrated by everyone, but I know what you meant. She's pretty popular with fans.
And I don't think she's ready at all to become a soloist. Hopefully she has AT LEAST a years amount of training before they do something with her... But I really don't think she'll do well.
And I'm hoping she is replaced in OG, but at the same time not... This is definitely a chance for Sengoku or Sawada to take her spot, but I would love to see Shibata or Fujimoto in the group at the same time. I would mention those four (Kanae, Ai, Hiromi, Saki) Gatas members, but I don't think they actually sing
The rest of the team is Berryz/C-ute so I doubt they'll be added. So who knows if they add a member.
I can definitely see them adding Shibata, though