1. The panel after the 10 tails is said to have vanished shows naruto with a contemplative expression but most importantly, his eyes are closed. Could very well be from the disappointmen of 10 tails getting away. Could be because also he didn't save his new bijuu buddies from Tobi's scheme. However, that's also indication for gathering natural energy and molding sage chakra. The following vertical chase showed naruto being pushed back for the first time in a while; implying he was gathering natural energy under focus.
2. Kakashi's kunai. It passed through tobi and was kamui'd into redirection. It struck tobi's foot while he was solid. Kakashi just got a sweet detail there. I really hope he had chakra strings attached or ninja wire, he could effectively pull off a similar move the 4th performed with the chains during the minato vs. Tobi fight. Kakashi, like shikimaru, does not needlessly waste chakra on ineffective jutsu. That kunai was step 1 in the soon to be victory in this particular battle against tobi.
3. Gai's weapon blocked tobi's fan (solid) without gai being knocked away outright. Could be meaningless but likely has significance if kakashi's kunai had more to it.
4. Just noticed that tobi's helmet rises higher than his old mask. The helmet now has a shape to account for a zetsu shaped flytraps head. I guess if tobi is a zetsu originally then the madara itachi met was a zetsu replication of madara using his chakra. Tobi can then appear to be anyone depending on the chakra signature he chooses. Really no point thinking tobi is anybody at all other than a "mime" hosted in a zetsu body. He could be anybody he wants whenever he wants.