@Burning Kitty
Ya know, I've been reading up on Lobo. Dude has a timemachine in his motorcycle, or at least he did at some point.
Things could get complicated between Kara and the rest of the team, depending on how this all plays out.
If he has a time machine and she figures/finds that out. You better be damn sure she is going to try and steal the motorcycle to go back in time plus she would have a sweet ass flying space motorcycle to ride to her planet on. She won't kill the other Leaguers but she damn sure hurt them like hell. If you think she was mean or whatever before if they successfully stop her, you better lock her up in a red sun generator room, because she will make you make you pay a thousand fold.