The symbol on Vokan's chest is called the 'Eye of Amagordo.' This is a reference to the 'Eye of Agamotto' used by the Marvel comics' character Doctor Strange.
The map discovered by Orko features the same cross symbol seen on He-Man's armor.
The animated sequence of He-Man retrieving the Sky Sled from the back of the Attak Trak and leaping onto it was first seen in Prince Adam No More (1983), however this time the animation of the vehicle's steering mechanism, head ram and laser gun popping out is omitted. The same sequence will be seen again in Revenge Is Never Sweet (1984).
The animation of He-Man catching the falling Life Bringer is reused from the sequence in which he caught a falling tower in Return of the Gryphon (1983). Another variation was seen in Capture the Comet Keeper (1985).