Superman seems to get the Earth to change its direction of spin in a matter of seconds. The Earth’s 24-hour period translates to an angular velocity of 7.27*10-5 rad/s. If Superman can bring the Earth to rest in a rotational sense in 5 seconds, he must cause an angular acceleration of 1.45*10-5 rad/s2. Due to the unimaginably large inertia of the Earth that we calculated a moment ago, the torque or moment that Superman must exert on the Earth is T = Iα= 1.4*1033 Nm. For a comparison point, when a person opens a heavy door, they exert a torque of about 10 Nm about the door’s pivot axis.
The notion that time’s arrow is somehow linked to the direction in which the Earth spins is absurd. Time flows in one direction; it is a corollary of the second law of thermodynamics. Although the passage of time is relative (faster or slower for objects moving at different speeds), its direction is unshakable. If the plot of the story really did require time to turn back, then the writers ought to have come up with a more plausible way to have it occur, like by way of a flux capacitor, for example.