The Black Vulcan has bare arms in one shot; his costume regains its sleeves in the next.
The SuperFriends trap the Legion of Doom in a giant egg carton. But because there are 13 members of the Legion, not 12, there is one villain missing: Brainiac.
Green Lantern says "It's time to fight size with size", then uses his ring to become a giant. He then captures Cheetah, Manta and Sinestro with one giant hand. For some reason, Sinestro's ring lacks this ability. And, in "The Giants Of Doom", they had to rely of the Legion's growth ray instead of simply using Green Lantern's ring power to become giants themselves.