Sabaody Part 2: Nika Kuma saves everyone from the Gorosei.
If Bonney's Fruit can give Devil Fruit users a second Fruit's powers temporarily with Distorted Future, Bonney really is one of the most broken support fighters in the series. Like, Bonney sees Teach use a Gura Gura move, and then gives Luffy Gura Gura powers for a period of time. Imagine Bajrang Gun, with added earthquakes?
The rule is that no one can "eat" two Devil Fruits, which isn't technically broken by Bonney's powers. Also, since Bonney knows Teach has two Fruits, it's possible she can just imagine futures where other characters could have two Fruits.
Probably the most unique Fruit since Law's or the Gear 5 reveal, honestly.