Adventure Comics #380

Adventure Comics #380 (On Sale: March 27, 1969) has a cover by Curt Swan and Mike Esposito.

"The Legion's Space Odyssey" is by Jim Shooter, Winslow Mortimer and Jack Abel and was reprinted in Legion of Super-Heroes Archives Vol. 9 HC. Hmm, guess what movie came out in 1969? The grieving Legionnaires erect a memorial to the Boy of Steel, then set about the task of surviving on the planet until they can leave. Using their powers and scientific knowledge, they build a spaceship. When the craft is damaged by a meteor, Ultra Boy guides it to the nearest planet. While repairing their ship, the Legionnaires are beset by realistic illusions. Later, when a storm threatens to overcome them, a mysterious whirlpool forms around them and saves them. The ship is eventually repaired, and Ultra Boy enables the craft to break the dimensional barrier and return to Earth.

When the heroes radio for permission to land, however, the Science Police accuse them of being phonies. Puzzled, Ultra Boy uses his penetra-vision to see robot duplicates of themselves, together with Superboy and Mon-El, at Legion Headquarters. A fantastic ray-blast then destroys the robots, after which the Legionnaires are given permission to land.

Superboy reveals that he has engineered all that has happened to the Legionnaires, with the assistance of the Legion of Super-Pets, because of Dream Girl's prediction that they would be "threatened by an evil old man in a sailboat, who would turn the wind against them." Meanwhile, the old man, Skyzznx, and his young female partner, Alrrk, are hiding in their vessel on the surface of the sun, and gloating over eliminating the Legion with their death ray, a weapon which taps the power of the solar wind.
These would-be conquerors of Earth are soon tracked down by the Legion, and Skyzznx pays for his failure by turning the death ray on himself and Alrrk.

Edited by Mort Weisinger.