Get the Sikhs to revolt as well, which isn't very hard. India post-Mutiny would be disunited, at least in the North west of Bengal (where it happened). India would see yet more war, and I'd say the Sikhs would be dominant for a while, until either the British or Russians come knocking (or some combination thereof).
That's an oversimplification. Some rebels supported the restoration of the Mughals, but others did not. I believe there was a movement to restore the Maratha Peshwa as well, among others, and the Marathas played a tremendous role in destroying the Mughals. The Sikhs would just be yet another rebel faction.