Konoha: Unable to learn ninjutsu, they had to develop their own.

perhaps.

Once they gain the upper hand, there's a chance they can win over Orochimaru.

On his way back, Black Zetsu thought to himself.

Not long after.

He stopped and emerged from underground.

"How about it?"

"He didn't agree, but he did promise not to tell anyone. Orochimaru's words are credible."

"That's fine."