The New Titans #90 (1992)

Total Chaos - That Which Lurks Within a Star
The New Titans have discovered that Starfire had been replaced by an imposter (secretly the Team Titans member Mirage). With the imposter’s next destination being S.T.A.R. Labs to visit the pregnant Donna Troy, the New Titans fear for Donna’s live. En route to S.T.A.R. Labs, the New Titans are attacked by Mirage’s teammate Killowat. The fake Starfire, Mirage, has freed her captive teammate Redwing from a S.T.A.R. Labs cell, and are planning on killing Donna Troy before she can give birth. However, the two are interrupted by Deathstroke. Deathstroke, on the way to S.T.A.R. Labs to find a cure for his current sickness, discovers Mirage and Redwing, who attack him. Mirage and Redwing are joined by the other Team Titans, and Deathstroke is shocked to find out that one of their members is Terra, whom he believed to be dead. With Deathstroke down, the Team Titans are stopped from killing Donna Troy by the New Titans. However, as the two clash, they are interrupted by the evil dictator-god Lord Chaos, who has traveled from the past to ensure his own birth.
Release Date: 1992