>Battle of Gods
Yes, this is when they reveal that there is YET ANOTHER level of deities in the Dragonball Universe.
Above the Kamis, who rule a world.
Above the Kais, who rule a quadrant.
Above the Grand Kai, who oversees them.
Above the Supreme Kais, who rule the universe.
Above the Grand Supreme Kai, who manages them all...
There are the Egyptian Kais, who evidently rule the multiverse.
Because, well... everyone loves furries, right? Every tenth background character in Dragonball is an anthro, anyway; and there were several such minor characters, too.
The poster and name/description is on several websites, including wikipedia and the dedicated Dragonball wiki; so it's either legit or it's fooled a LOT of people. It also says Toriyama was heavily involved in the production process, however. Despite his being famously forgetful, I can't really see him deciding to make Gohan a Super Saiyan again and tossing the Mystic power-up out the window just because GT did it. I don't know. It's not like movie poster art ever is copies of actual scenes in the movie. They might have done it just because it would look weird with every Saiyan on the cover having gold hair, except him.