I was just musing on Batman Returns, and had the random thought that the Penguin's gatecrashing scene would have been the perfect opportunity to have him wear the full comic-book regalia, e.g., the top hat, the suit, the monocle, the cigarette holder, etc.
In the finished product, he never wore all of it at once. Even the monocle was only ever seen in promotional materials. Wearing all of it to Shreck's party, while serving as a great and faithful nod to the comics, would have also been a subtly hilarious jab at the formality and faux-politeness of the Gotham elite.
It also could have served as yet another inversion of the concept of the costume ball. Bruce and Selina both went to the party with their public faces serving as their 'masks', and the beastly Cobblepot would have gone with his 'mayoral humanitarian' guise as his own mask. Kind of a missed opportunity, but still a great scene on all counts.