Sasuke's S/T ninjutsu
I know threads have been made on this topic, but I want to throw my two cents in. This is an analysis, not wank.
I think it's obvious what Sasuke's S/T ninjutsu is - time manipulation - he can now slow down time around himself, but still move at his normal speed, thus technically traveling instantly.
This means that Sasuke can now theoretically counter Kamui and FTG. If he stops time when Obito is solid, and he does what he did to Madara, Obito's not going to have Limbo to save him. And with Minato, he can just stop time when Minato throws one of his kunais to use FTG.
This is just what I gathered from the spoilers; I could be wrong (and I hope I am, because this would officially be the most OP jutsu in the NV).