Challenge of the SuperFriends

When Black Vulcan is first seen at the Hall of Justice before the group is taken by the Legion, he's seen in his original costume from The All-New SuperFriends Hour, and then later when Superman, Wonder Woman, and Green Lantern return to existence.

When Lex appears to Hal Jordan just as he is about to be carried off by a beam of energy, he warns Hal to get out of the capsule while he still can. If he thought it was dangerous, though, why would a heroic person like Hal Jordan let Lex enter the beam of light?

The sun of the planet the Legion sends infant Kal-El to is described as a red sun, even though it is clearly white. A white (hotter) sun would make Superman more powerful, not less.

As we'll find out in the "History of Doom" episode, Lex Luthor became a bald supervillain because of Superman's intervention as Superboy. So with no Superman, how did Lex ever become his villainous self? Ditto for Bizarro, who is a faulty duplicate of Superman himself. Even if the Legion is immune from having their memories altered, wouldn't the Superfriends wonder who that Bizarro guy in a Superman outfit is?

When the escaping Superfriends bring up the Legion's computer files, the picture of Green Lantern shows his costume is entirely the darker green of his inserts.

When Superman rescues the imprisoned Superfriends, among them is Green Lantern...who is at the same time outside anchoring the Legion of Doom ship. It should be Aquaman among the prisoners - GL is in his place.

In the first shot of the Hall of Justice, right before the Legion launch their attack, Hawkman's leggings are flesh-colored rather than their typical green.