Comic book authors are constantly trying to change things up, to keeping long-time readers interested and to give a new generation a way to relate to superheroes who have been around for decades. The backstories change, the characters themselves change, and for visual effects, those iconic costumes get changed. Sometimes the change in costume is too drastic; sometimes it’s just dumb. Like the time Batman died and Commissioner Gordon took on the role, using a huge mecha-suit to give him the strength of a much younger and fitter hero.
Yes, for some reason, old Commissioner Gordon thought that the best way to live up to Batman's legacy was to strap himself into a Japanese cartoon labeled with "GCPD" and pass it off as a Batsuit. It had police lights. It had a diaper. And for some reason, Ultra Super Sentai Mecha BatoMan also came with bunny ears. It's like they held a coloring contest and the top 50 children all got to include one stupid idea in the new Batman suit.
That didn’t last long. There have been other extreme missteps with superhero costume changes, detailed at Cracked in the colorful language you’ve come to expect.