Rapid-Fire Fisticuffs: He's almost the only character in the game who can rack up to 14 hits in a single combo. Oh, and his "Flashy Beatdown" Heroic Brutality involves him not only using this, but also Rapid Fire Bicycle Kicks.
Neck Lift: Uses it on Kano when the Rage takes him over.
Weaksauce Weakness: In addition to his well-known weakness to Kryptonite, he also has a weakness to magic. Since a part of the fusion of both universes is fueled by magic (originated from the MK side), this serves as a Hand Wave as to why Badass Normals can fight him on equal footing.
To be fair, Superman's weakness to magic is moderately documented in canon sources, yet easy to forget because foes that use it on him are few and far in-between.