Neither hopefully. The trinity should never be paired together.
Tom Taylor made Kara all gaga over Damian in In justice but that also had plot reasons. I don't think Taylor is the kind to do romance aside from established romances.
Rather than share the the strong female I'd rather we finally get a Superbat or a scenario where they are both pinning for cassie but she's making eyes at Mera or something.
Or just stick to a story about bio-electro zombies.
I'm more excited about the prospect of Damian working with Constaintine and Swamp thing