On the left side of the stage, a Mechanical Guard can be used to damage the opponent. Also, a Turret can be found and can be fired by Gadget Characters, or thrown by Power Characters.
Mid Screen of the stage, Metallo can be found and slammed at the opponent or bounced off of/exploded by Gadget characters.
On the right side of the stage, a Cryo-cell can be found and bounced off of or exploded by Gadget Characters, freezing the opponent, or thrown by Power Characters, slamming it onto the opponent.
On the left side of the stage, a set of Large Lifting Weights can be found and be bounced off of/exploded or slammed at the opponent.
Mid screen of the stage, Gorilla Grodd can be found. Here you can knock the opponent into him, and open up for additional combos.
On the right side of stage, three Fuel Canisters can be found next to one another and can be thrown at the opponent. Also, on the right corner of stage, a Generator can be found and bounced off of/exploded or slammed at the opponent.
On the left side of the Cell Block, a transition can be performed sending the opponent through the wall crashing into an airborne helicopter. As the helicopter yields to turbulence, it sways and plummets into the Yard.
On the right side of the Yard, a transition can be performed by sending the opponent through the wall, crashing into a gas valve and launched by its ignition. As the opponent ascends, they hit numerous support beams and finally crash into a cell that follows the opponent as they fall into the Cell Block.
Stryker's Island was first revealed in the Red Son DLC trailer.
If one listens really closely during the transition where the Player/Opponent hits the airborne helicopter you can briefly hear the pilot yell "Mayday! Mayday! I've been hit! I'm going down!" as the Player/Opponent lands inside the helicopter.