Son Goku and Vegeta will attempt a fusion to defeat Zamasu and Black Goku. In episode 67, Zamasu might be defeated by a friend of Son Goku from the past.

Previously in "Dragon Ball Super" episode 65, Zamasu and Black Goku have fused their powers. Their combined entities resulted in an extremely powerful being, and it will be difficult for Son Goku and Vegeta to defeat their fusion.

The upcoming titles of episode 66 and 67 were leaked on Twitter posted by Todd Blankenship, although these titles have yet to be confirmed. The alleged title of episode 66 is "One Last, Great Comeback! Here's Vegetto," while episode 67 is "A Visit from the Omni-King! Bye-Bye, Zamasu."

In episode 66, Son Goku and Vegeta are expected to try their own fusion in order to defeat the fusion of Zamasu and Black Goku, GamenGuide reports. Son Goku and Vegeta's fusion will result in a being called Vegetto, who has a Super Saiyan Blue form. It is anticipated that the Kaioshins will lend the Potara earrings to Son Goku and Vegeta in order to create the powerful fusion.

But it seems that the immortal Zamasu and Black Goku will still defeat the powerful Super Saiyan Blue form. 

Meanwhile, in episode 67, the Omni-King will allegedly interfere in the battle between Zamasu and Son Goku, according to Sportsrageous.

The Omni-King previously invited Son Goku to visit him, and the two formed a good friendship. Before he left, the Omni-King gave a device to Son Goku that enables him to ask the Omni-King for assistance in a time of need.

Son Goku will then use the device to call the Omni-King, which will help end the battle and defeat Zamasu and Son Goku for good.

According to Whis and Beerus, the Omni-King has the power to destroy anything and anyone in a blink of an eye. This could mean that Zamasu might meet his end at the hands of the Omni-King.

"Dragon Ball Super" every Sunday on Fuji TV.