https://twitter.com/...194282404851712
It's tentatively called "Road to Sakura" as of the moment. Looks we were all right. The movie is definitely going to have lots of development on Sakura that's been seriously lacking in the manga. And so as not to put Naruto out of the picture, there's going to be NS developments for sure.
As for the filler episode itself, considering how it's being used to promote the movie. I'm willing to bet good money on Kishi being involved in that episode specifically, too.
I think for all those that has been begging for more Sakura development (even if it's outside manga continuity) from Kishi can now officially say HALLELUJAH!!!

