It's in episode 53, right after the ending song and the preview for the next episode.
it was a flashback from an episode.
because ANBU is the powerful group team in NARUTO.
take charge in a group of individuals
no one, there isn't a team 11 that we know of in Naruto's generation of shinobi.
Currently Naruto is part of team Kakashi so nope he doesn't have his own team yet.
If you watch the trailer it seems as though Naruto and Sasuke team up to defeat a new enemy trying to take over Konoha
Team 7
naruto sakura and sai
if its naruto arena, then Team 7
i would say zaku temari and naruto shippuden try that team there awesome
a good team for this mission would be neji sakura and naruto
team 7- naruto, sasuke, sakura or... sasuke, dosu and tayuya this is what i think