i think he put the kakashi gaiden in there to clear up where he got his sharingan from..but i also think he might of put it in there for another reasonWell The Only Reason I Think Its Obito Cause Why Would Kishi Put Kakashi Gaiden In The Manga Its More Of A Filler Episode In Anime Cause Someone Or Something From That Time Line Or Event Is Effecting The Future Right Now Cause Filler Arc Arent Put Into The Manga So Thats What leads Me To Think That Tobi is Obito And They Have Alot Of Similarity's The Hair And Why Would A Uchiha Have Only One Eye Hole In The Mask Kishi Just Tryin To Mess With People Head With Danzou Shishui & Madara But hey I May Be Wrong Will Have To Wait And Find Out