Superman: The Last Son of Krypton (1996)
Dirs. Dan Riba / Scott Jeralds + Curt Geda / Bruce Timm + Dan Riba
The Last Son of Krypton — not an adaptation of Superman: Last Son of Krypton, which is a 1978 novel by Elliot S. Maggin — is episodes 01-03 of Superman The Animated Series merged together into a one-hour TV Movie. The join could've been better, but the pacing is pretty good.
It's the now-familiar origin story of Krypton's finest son, but familiarity doesn't dull it. In fact, the scenes on the doomed planet are the best part. So too is the voice work; the Earth cast are good, too, but not as impressive as Krypton's.
Clark / Superman's (Tim Daly) adolescence feels a little hurried, but the key players do each get some time in the spotlight. So too does the main villain of the series proper, Superman's nemesis, the bald billionaire Lex Luthor (Clancy Brown).
Being sold as a pick-up-and-watch movie makes the open ending feel a little awkward, so you might want to get TAS afterwards for the rest.