On-sale date from copyright registration and from house ad in Legion of Super-Heroes #266; Len's Line-Up column in November 1980 issues has on-sale date of August 11.
This issue is a variant of The New Teen Titans (DC, 1980 series) #1 [Direct].
There exist further variants:
Starfire escapes from the Gordanians and makes her way to Earth. Raven has manipulated some of the original Titans, and a few new recruits into forming a new team and rescuing Starfire when the Gordanians arrive on Earth to recapture her.
Marv Wolfman discusses how both Marv and Len Wein broke into comics together working for DC on the original Teen Titans series and now after many years they are back working on the New Teen Titans title.