Re: Kakashi and Obito have some explaining to do
Well I can answer for sure WHEN this scene with Kisame is happening. It is the same year as Itachi did the Uchiha massacre.
Here you see Kisames memory of a mission he did for Fugaki, the fat guy of 7 swordsmen. "Yagura" controlled by Obito, some years later made Kisame kill Fugaki. Notice that Ibiki approaches Kisame in this picture:
Now see this chapter from the chunin exam, which Obito took part in:
It clearly proves Ibiki was also in the chunin exams at this time. From these 2 informations we can make a very qualified guess, that this scene:
Must be about the same year as the Uchiha massacre, since Kisame most likely joined Akatsuki a bit after Itachi, given from the scene, where he talks to Itachi about sharks (wont look for it..)
And to add another proof. The man Itachi approached to help him out with the Uchiha massacre had the exact same spiky hair, as the shadow we see behind Yagura.
So it can still be Obito. None ever said it was ONLY during Yaguras reign that it was called the bloody mist, also it is said NOWHERE who the 3rd mizukage was, and nobody seem to ask that question. Well my guess is that it was Madara since the 2nd mizukage died very long ago.