The narration explains that Amalgamus is the new leader of the Galaxy Alliance who records and relays the opinions of all 900 planets; however, five years have passed since their enemy's defeat, making there no reason for the Alliance to abruptly replace its human officials with a single robot in the middle of peacetime as seems to have been done.
Lance says that the Red, Black, Blue, Yellow, and Green Lions' powers are Fire, Air, Water, Earth, and Life, respectively, but in the original series they were directly stated to be Fire, Lightning, Water, Magma, and Wind (note: the new scenario was actually closer to the one in "Hyakujû ô Gô-Rion" (1981), the anime series which inspired "Voltron: Defender of the Universe" (1984), where they were the Chinese Five Elements of Fire, Air, Water, Earth, and Wood).
Coran says that both Zarkon and Lotor were responsible for the attack on Lance's home, though Lotor always attacked abroad while one of Zarkon's generals such as Yurak led the forces, until Lotor himself became the head of command in the original series, so Zarkon himself never directly fought.