[Actually, he probably would have made a good Superman back in the day. He was properly heroic as the Phantom.
Yeah, I thought he did a nice line in playing an old-fashioned earnest hero in the vein of Reeve's Superman in that movie. And at a time when the likes of Keaton, Kilmer and Clooney were content to let their Batsuits provide their physique, Billy got properly in shape to fill out the Phantom's purple cossie.
Out Of My Vulcan Mind wrote:
The time when Billy Zane might have been cast as Lex Luthor is long gone.
You're almost certainly right, but it's still fun to speculate. Remember when people thought Jude Law, who has a bit of a young Terence Stamp about him, might be a good General Zod? I'd say that whoever plays Lex in any sequel or threequel to MOS will be someone we never saw coming - who would have guessed Liam Neeson as Ras Al Ghul, or Heath Ledger as the Joker or Michael Shannon as Zod?