Uchiha Sasuke had no choice but to agree to Uchiha Obito.
In truth, Uchiha Sasuke held no interest in the power of the Eternal Mangekyou Sharingan, nor did he care about the Eye of the Moon Plan. He simply drifted along and numbly accepted Uchiha Obito's proposal.
Nor did Uchiha Obito attempt to lure Uchiha Sasuke into targeting Konoha, for he knew that the true danger now lay not in Konoha, but in Uchiha Madara and Emiya Shihara.
Chapter 201