Northern Lights
[BritishSarcasm]
Alot of people believed they haven't included Kakashi Gaiden in the anime yet is because Yondaime's voice will reveal something...
Or somethin' along those lines...
well Yondaime, is gonna appear..
.. in Jiraiya's falshback when he's fighting Pein, so theres no need to worry about that
also they better not muff up Minato's voice, damn it -_-