Naruto can afford to take backstage to all of this, so for myself, I'm not missing him at all. He'll show up with his super nuke Rasengan at just the right moment anyway. As for the Storm release, I'd say it's a combination of the Lightning element and Water element if only for the fact that it's the only 2 elements he's been shown to use so far.
Anyway, good stuff, good stuff. There should be some nice fighting sequences once the anime finally gets near this point (I hope...). But Kishi is gonna have to reveal quite a bit of back story on these characters that are just being introduced for the first time.