The two direct-to-DVD movies MGM made over the past couple years based on the “Stargate SG-1″ universe is coming to the SciFi Channel beginning this spring. “Stargate: Ark of Truth” as well as “Stargate Continuum” will air on SciFi Channel as Sunday night movie events, and could complement the release of the new series “Stargate: Universe,” which may come out in July. At the same time, “Stargate: Atlantis” will continue to live on SciFi Channel as a television movie, which also will air on SciFi Channel, and could be shown during the “Universe” mid-season break, according to Multichannel News. That means there will be plenty of Stargate on SciFi Channel throughout 2009, and even more coming soon to a DVD store near you. Brad Wright, co-creator of “SG-1,” said that there will be …