Filming on the epic DC feature film begins in April.
Amanda Tapping will also direct the new vampire hunter series.
She'll play a future roboticist in an upcoming episode of The CW's new sci-fi series.
She'll play an antagonist in next week's new episode.
The actor played the Satedan Tyre on Stargate Atlantis.
The original series made Richard Dean Anderson a household name.
The independent genre feature is currently filming.
The Stargate veterans will both play villains from the DC Comics pantheon.
Dennis Haysbert and SG-1 guest star Ian Tracey have also been cast in the potential series.
SGU's Brian J. Smith co-stars on the sci-fi drama from the Wachowskis and the creator of Babylon 5.
The SG-1 co-star discusses her directing career and the Devlin/Emmerich reboot in a new interview.
The Stargate veteran plays a scientist in this Friday's episode.
The 18-episode season of the hit Canadian drama will air on CTV.
The CW has just picked up the drama for mid-season.
The Stargate Atlantis actor will appear in the FOX revival, premiering in January.