Heh, that would be awesome and a lot of people here would rejoice (myself included). Too bad that'll never happen. However, I don't see why they can't at least show it during a montage of young Clark in Metropolis or a flashback or something. That would be a good way to work it in without making it the look for the whole movie.
As for the boxer briefs kinda look, I really liked Allred's Space Age version.
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