I don't know, really. i mean, raven is like the independent one andeverytime she falls in love, things go for the worst. I don't think she'll end up with any of the current characters anyways.
It's Bumblebee not Bee girl and to answer your question...
Maybe a character that is not yet in the show or one of the villains(Kyd WyyKyd, Red-X) if they decide to turn good. But, realistic to the sires, Terra is gone or at least can't remember anything and it would be Raven and Beastboy if it continued. Not that I'm a BBray person or anything.. I just can tell that's what the creators intended.
cyborg and terra earth one has quickly become one of my favorite titans ships with cyborg/sarah simms. victor and tara show that they truly love each other in that comic. also if they continue with volume 3 and show more i think changeling/gar and kole would be an adorable couple too. and enough with the cyborg/bumblebee pairing they dont match. its more the fact because they are both black characters.