Stargate Atlantis almost got a direct-to-DVD sequel movie titled Stargate: Extinction, which would've taken the Atlantis crew on a wild new adventure.

They find a land that recalls Egypt and humans in a primitive culture that worship and are slaves to Ra, the God of the Sun. But soon they discover the secret of the mysterious "stargate".

When the Stargate team goes to see Ba'al, the last of the System Lords, being extracted from his host. All of a sudden, Tealc, Vala and all of their allies start to vanish. Later Carter ...