Wait wait I just realized...the man behind the mask....is Gerard.
No. Its Aizen. Just as he planned.
Anyway... I love Minato and Kushina's backstory more than the current manga events... or most of the manga... I liked Kakashi's Gaiden as well. I think its the fact that they are real ninjas, not wannabe ninjas putting friendship over national security. Okay... Kakashi and Minato do look after their friends and all... but we haven't seen them place a whole village in danger to protect a Missing Nin.
Yet...
Anyway cool chapter, Minato's technique is always interesting to see in action. We got dropped another factoid that will probably trickle down to Naruto. Kushina not dying after having the kyubii extricated clears the way for Naruto to eventually be rid of it and survive so he can participate in some later final battle (Sasuke) without relying on it. My first guess would be down the road somewhere Tobi will suck the Kyubii out of Naruto and make his doom creature and then gattai with it. Then Sasuke and Naruto (thanks to Itachis big black cock) withstand the mass hypnosis and join forces to fight the monster/Tobi.