Any way i DO hope Sakura does some kind of miracle "anti-fail" jutsu that ,makes her worthy of being a member of the new sennin.
There can't be any new Sanin. It was a title given to Oro/Jiraya/Tsunade by Hanzou in recognition of their encounter, it is not an official shinobi rank.
Naruto and Sasuke have also been elevated far past the whole Sanin parallel, with their rivalry representing the conflict between the elder son/younger son and hate/love.
As for Sakura, she will never be anywhere near the plane of power her 2 original team mates now occupy. Kishi basically kicked her off any connection to a relevant plot by making her step aside the Naruto/Sasuke situation, in which she admitted how much a fail nin she is and thus will simply leave it to the boys.