Fan Casting Godzilla vs Aliens (1978)

My idea on how the Showa series should've ended. The year is 2000. A collection of evil aliens called the Dark Mysterious Star Alliance launched their penultimate monsters of pure evil. Gigan, now equipped with laser eyes and other unique abilities, SpaceGodzilla, a celestial clone even stronger than Godzilla, and Mecha-King Ghidorah, the invincible three-headed machine! To save the world, Godzilla and his friends must destroy them all!