I was wondering, how much time passed between the Invasion of Pain and the start of the Fourth Shinobi World War? I ask because, Konoha was leveled by the end of the Pain Arc, yet it looks mostly rebuilt by the time Sasuke arrives there. Also, Naruto states he's 16 in the Pain Arc, yet has just turned 17, meaning he was likely close to being 17 for a long time. Also, he does look somewhat older since the Pain Arc.