i think the lead role will be reina-riho n one from juukies^^
tsunku said he need someone to replace ai...so we will see one more lead vocal~~
i dont know about risa...
I would like to say that I am hoping for a Risa with main lead and Reina and Sayu with leads as well.
I never read that Tsunku said he was looking for the voice to replace Ai, I just alwayse assumed it would be Riho. It seems she is the best of the 9th gen. IDK if I will agree with that but she has been getting all the solo of the 9th gen and Riho has always been singing songs with Ai, The Spring performance of Moonlight Night comes to mind first. I like Riho's voice and I have always thought that if a 9th or 10th gen member would get Ai's lines it would be Riho. Although if they pick a senpai I would either pick Risa or Reina