One of the funniest things about Kevin Smith's telling of his experience is when he says that Peters ordered him not to show Superman flying because he thought it was "gay" or maybe that was the costume...so he wrote in the script that we see a red/blue blur streaking across the screen! Hmm...Red/Blue Blur where I have heard that term before?
Wasn't this the film where the plan was for Superman to have a black costume and silver S shield?
Which I think was used in the Death and Life of Superman series (I've got the novelisation so now sure what the actual comic run was called).
Supes wore a black suit with a sliver shield when he returned from the dead during that story arc. It is probably where the movie people got the idea.