Batman, Alfred and a Robot Dinosaur
BATMAN CHRONICLES #8 does their own take on the robot T-Rex in the Batcave, with this short story about Batman fighting robot dinosaurs and robot cavemen for sentimental reasons.
Isn't there a Dinosaur Island in the DCU with actual dinosaurs on an actual island? Or is that lost in the mists of Pre-Crisis Time?
Well, it's a little less morbid than a "memorial case." At least things like a robot T-Rex and a Giant Penny show "Here's what criminals used to try to kill me, and I'm still here."