I cannot remember their name now, but I believe they were a Korean animation studio that did all the big fights, or very nice looking ones -- Sasuke v. Orochimaru, Rock Lee v. Gaara, Naruto v. Sasuke, etc.

I do not see this series going the route of Dragonball. However, if it were I would expect it to follow suit with Dragonball in the sense that the first series will be it in its prime, and anything thereafter or done substantially later will hold no weight in comparison to the series we currently have.

And, I think Naruto was jumping upside-down, just to show off his goofiness in even that moment.