Intel: little for either side. Aang has found himself lost in the "sound village" from Naruto and is forced to defend himself against hostile ninjas. He learns the basics of their capabilities from fighting fodder until Sasuke arrives to challenge him. Sasuke doesn't know about Aang's abilities yet.
Mindset: both are in character.
Prep: none for either side.
Battlefield: abandoned cityscape 50 feet apart.
Victory conditions: kill/ko/surrender
Round one: both the avatar mode and curse mark have been restricted.
Round two: there are no restrictions , any technique and form can be used.