I don't recognize the shot from any early Season 1 DS9 episode, so yeah it's almost certainly an f/x recycle from TNG to pad out the trailer. Even in the theatrical trailer to Generations
about two years later Paramount reused TNG clips to fill gaps left by the film's then-incomplete visual effects.
Paramount loves to cut corners where it can. Can't say I blame them, though there are times when it's painfully obvious and even a little laughable. The Starship Bozeman
emerging from the temporal rift in Generations