Ok, 1st off: some of use predicted it: Obito's butt hurt because Kakashi let Rin die. But still.. causing a 4th Great Shinobi War over the death of a girl? And Madara Uchiha came out of NOWHERE to join the fight, which is going to be interesting because Naruto in his Kyuubi Mode is really the only one doing damage to obito, but madara could control the 9 Tailed Fox.
Con: I could've done without the 10/20 pages of Flashbacks. I mean.. c'mon kishi.. we're at chapter 600 if someone doesn't know HOW Obito died or HOW kakashi got his sharingan they could just back track.