Most of this chapter was flashback. Although flashbacks provide good knowledge and make re-reads more enjoyable, it is a short term annoyance. Also the many two pages frames greatly shortened the chapter. That said I will focus on the current parts of the chapter. First of all, Naruto took minato's half of the nine tails. This allowed him to re gain full nine tailed mode even though his chakra was previously sucked out.
Also Sasuke seems have always had a sage mode of his own. The curse mark originated from juugo's sage mode like abilities. It so follows that he can coat his susanoo in curse mark chakra by having juugo close inside. Sasuke knows the curse mark so well, that he can use the chakra output from juugo to make his attacks just as effective as naruto's. Obito has no chance. I loved that frame with both of them attacking at the same time.
Second hokage said that sasuke csn surpass madara which isnt surprising, the question is when. Will it happen in this battle, against naruto later, or later as hokage? Only time will tell. Weird how Obito plans on killing Naruto and Sasuke. I thought he had plans for them. I predit a look into those plans in the coming chapters, as well as somr serious smackdowns by naruto and sasuke.