So true!
Seriously who needs a guest when you can have Arashi!

But have you heard Aiba at the beginning?
He said it was a new experience and that they would be allowed to do more if it succeeded! And he will do all his best

So I say : YATTA!!! we'll have more

Now the thing is, will they wait do it regularly or wait for a member to have a release. So next would be Nino or Ohno, I guess