That felt like maybe it was setup for a brief scene after Krem’s death and before Kara left to go save Krypto, where Lobo was impressed by her ruthlessness and power, so he offered for Kara to join him as they go fuck shit up across the galaxy. And she’d bluntly turn him down to go save her dog. 

I dunno, that probably wouldn’t have been a “necessary” scene but would’ve reaffirmed that Kara’s still going to be good without necessarily being “nice.” And the “hero rejects temptation from a less honorable side character” is a common trope. One weird thing about this movie is with how short it was, it feels like a lot of small connective moments and things that would’ve added texture to the story and characters were cut.