...came back and Surprise Released?

NSYNC?

Backstreet Boys are still releasing music.

I know, so is 1D. Y'all don't think too much of it.

By "came back" for 1D, do you mean if Zayn rejoined?

Anyways, NSYNC probably would, followed by Destiny's Child, followed by the Spice Girls.

Few would care about the Pussycat Dolls, Backstreet Boys are currently active with mediocre performance, and 1D are obviously currently active and successful.

An ABBA return would be legendary, but I doubt it would shift huge figures (at least not in the US).

1D obviously