There's a difference between wanting occasionally ninjas, but not often, and between having every one or two weeks a new ninja. This is a little bit too fast.

Or...when I think about it, before 5.0 Oasis said, that they were slow because of bugs and other problems that required to be fixed since 3.0, and but now they have a catching up to do, meaning that if there weren't problems after 3.0 through 4.0, we would have had Minato some time ago, and 5.0 we would have had some months before as well, since OG fell back from schedule. So I suppose this is being them catching up to the schedule.