I don't know what that smiley face is supposed to mean...Y2Jerk...but I'm going to assume it means that you want to know more. Superman: Brainiac Attacks is a Direct to DVD movie produced by Bruce Timm and the people behind JLU. It features the voice cast of Superman: The Animated Series, including the return of Tim Daly as the voice of Superman. It's probably the last project for the old DCAU (B:TAS-JLU).
I'm guessing the Supergirl DVD is just a reprint of the old disc. Studios triumph these "re-releases" alot. Or wait, am I crazy, or did Anchor Bay release Supergirl on DVD the first time?
And I've heard good things about Superboy.