Originally posted by SSJGGogeta
1. That was a non cannon movie.2. That wasn't an alternate universe. That was a psuedo version of Infinite Tsukiyomi that Obito was testing out on Naruto and Sakura. Nothing more, nothing less.
You used series as a generalized term.
1. It was written by Kishi himself.
2. You'd think that but no it really is an alternate reality. The Sakura in that world was literally switched with the Sakura of the normal one instead of coexisting like Naruto and Menma.