While the original series, Stargate SG-1 ... 6 would be greenlit during the production of Season 5, the producers attempted to convince MGM and Syfy to extend the fifth season from 20 to 22 episodes.

A decade before the MCU redefined Thor and the Asgardians, Stargate SG-1 ran with the idea of Thor and the Norse Gods as being aliens, and in the context of the sci-fi franchise, it worked.