Step One: Construct a giant concrete sarcophagus similar to the contraption they used to seal off Chernobyl.
Step Two: Hire a reliable private investigator to ascertain the location of the target: Creed's rehearsal space.
Step Three: Fill the sarcophagus with alligators, poop, and diseased ferrets.
Step Four: Rent several hundred industrial-grade helicopters and lower the sarcophagus onto the target.
Step Five: Construct a monument honoring the heroism of the alligators and diseased ferrets.