^So far it seems they debuted. They are supporters for the Volleyball World Championship. The groups that have done this before them are all debuted groups (V6, Arashi, NEWS and Hey! Say! JUMP!) They will also have a tour this year. I don't think they are temporary, they were made to last. I kind of like their first single and I think they are cute. Even though I could be Marius' mother. Haha.
I still wonder why they locked the thread. I mean, I've seen worse on AHS and I think the whole "ew, they are called sexy zone and are just little kids" thing gets old. Get over it.
Here is a link to the locked thread.