The Superman: 5-Film Collection has four movies making their debuts on 4K, though really only two of them are worth a damn. I suppose if you’re a Superman fan, maybe it’s worth it, but probably only when it’s on sale.
Superman II is hardly perfect and with Richard Lester replacing Richard Donner probably made for a whiplash of a movie in terms of tone, but this still managed to be an entertaining sequel though the goof levels were taken up a notch.
Although X Y & Zee is a bit too outlandish for me, the trio cast of Taylor, Caine and York was fun to watch and some of the darker humor did work.