Original sentence: They first appeared in the 1994 film Stargate, directed by Roland Emmerich, and then were redesigned to subsequently appear in the television series Stargate SG-1 and Stargate Atlantis (as well as the animated series Stargate Infinity)
Edited sentence: They first appeared in the 1994 film Stargate, directed by Roland Emmerich, and then were heavily redesigned to subsequently appear in the television series Stargate SG-1 and Stargate Atlantis (as well as the animated series Stargate Infinity)