Mumbai, Feb. 26 -- John Abraham and Emraan Hashmi promise to bring the action back to the big screens with Mumbai Saga. The trailer of their big clash in a cop versus mafia movie is out and looks like the audience will witness an adrenaline rush along with a tale of Bombay becoming Mumbai.

Amartya Rao played by John who is steadily rising in ranks in the mafia circuit and wants to rule the city. He puts a target on his back as he murders an industrialist in cold blood to get back at a rival. With a reward of Rs. 10 crores for the cop that kills Amartya, Emraan rises to the occasion and gives John a tough fight.

Suneil Shetty, Mahesh Manjrekar, Kajal Agarwal and Samir Soni are also seen in the trailer briefly acting as triggers in the big ...