Continuity mistake: Within the timestream, Starfire rips off Warp's vortex regulator with her left hand. She still has it in her hand when she first shields her face with her left arm, but as we see Warp dropping out of the timestream and Starfire following right afterwards, both of her hands are empty.
Plot hole: The alternate future Cyborg must stay connected to a large and heavy generator, which stands in the Titan Tower's common room, in order to remain functioning. But as we can later see, the power cables have a rather limited length, and the device is obviously too heavy to move easily. So how comes that Cyborg can roam the Tower and come through the common room's main door, where he appears when he confronts Starfire, without even any of the thick cables showing?