It would be more about Sasuke,Ino,Sai,Temari,Sasori,Sakura,Hinata,...
and less Naruto himself.It would be about the future when Naruto and the others are 18 Years old. Sasuke is back and Akatsuki is alive again. Sasori is good and in love Sakura. Sasuke is in love with Ino. Neji is the 6.Hokage because after Tsunade woke up again the people already had choosen Neji to be Hokage. At this Time Suna-, Konoha- and Kirigakure have an Alliance. They fight against Kusa and other villages. Because after Shippuuden a Ninja world war started.
it would be a gapfiller story centered between naruto and shippuden, and not some stupid series of filler arcs either, i mean what really happened to each of the characters in those three years: How Naruto's training progressed, How each characters second chunin exam went, how Neji, Kankuro, and Temari became jonin, What Gaara did to earn the title of kazekage...you get the idea
Well i quite enjoy Tokko what with the demons coming out hell and making people commit suicide, so i guess naruto and the other ninja would be the police squad to defeat them. Bit i would have a lot more naked women and men and a lot more blood and guts ^_^ kind of like Elfen Lied. Lots of blood and gore in that.
I've already written tons of Naruto fan-fictions... they're usually based on Gaara, Shikamaru Lee and Kakashi. (My top four favourite Naruto characters :P)
I'm thinking of basing one on mainly Madara...and the rest of the Uchiha clan... :3