It waits until you have almost given up on the cockpit, then drops Kouji Kabuto back into it and lets the Rocket Punch fly like no time passed at all. This is a 45th anniversary victory lap that actually respects the decade of quiet in between: Kouji is a researcher now, Sayaka is running the Photon Power Lab instead of waiting to be rescued, and Tetsuya Tsurugi with Great Mazinger carries the weight while the old man of the franchise catches up. Dr. Hell coming back with an army of Mechanical Beasts is exactly the ending Go Nagai's monster deserved, and Boss and Borot are still there to puncture the solemnity. Yes, the CGI beast hordes look cheap next to the hand-drawn work, and the new girl Lisa never quite earns her screen time. Nobody cares once Ichiro Mizuki's voice hits and Z stands up one last time.""}
A decade has passed since Kouji Kabuto piloted Mazinger Z to victory against Dr. Hell's tyranny. Now a scientist following in his family's footsteps, Kouji has left his hero days behind. Peace has settled over the world, fragile and assumed permanent. That changes when an inexplicable presence awakens beneath Mt. Fuji. An ancient structure emerges from the earth, bringing with it a mysterious lifeform that defies understanding. Whatever sleeps in those depths doesn't belong to any known science or history. Humanity faces a threat unlike anything before, one that forces Kouji to confront an impossible choice: ignore the danger and protect the normal life he's built, or answer the call one final time. The decision he makes could save civilization or damn it. Between the option of becoming savior or destroyer, Kouji must determine what kind of future humanity deserves. The past won't let him rest, and neither will what's coming.