I, for one, welcome the Flash/Supergirl crossover, but I wonder about a particular obstacle for future adventures. Let’s call it the Hulk Factor. Over in the MCU, the powers that be have already said that Hulk can’t appear in “Captain America: Civil War” because, well, he’s the Hulk. And what are you going to do about it if you’re on the other side? Same thing with Supergirl. Really. Supergirl is Supergirl and outside of Vandal Savage, there isn’t a foe in her class. Beyond that, Supergirl has J’onn J’onzz. Between the two of them, you need a full on super-powered villain and as menacing as Zoom is, he’s not it. I think this is also why it’s hard to do a Superman thing in general. Unless you give him and now Supergirl some sort of handicap, you need an over-the-top opponent some time. Luthor is special that way. He’s flexible, utterly malevolent, and possesses a power that is different from Superman’s.
I’m curious to see how this works out. I’m excited to see how this works out. But Superman has appeared twice in Supergirl, and then only fleetingly, and alas, I fear this is the only way Supergirl can appear in the Arrow-verse, separate and unequal, because Supergirl is the Hulk.
On the other hand, this is a great situation. Supergirl has always been this kind of secondary superhero, being Superman’s cousin and all. The series has moved, over their first half-season, beyond Superman which I thought would happen later. At the same time, with a crossover, she’s gaining her place as an over-powering presence, over another super-powered male superhero and by extension, over a pretty macho male vigilante at the same time.
All this being said, I am a big fan of the DC TV universe. I think they really do have something great going on, and The Flash (I was a fan of the comic as a kid) is one of my favorite shows. That one really is like how I envisioned what it would look like. Still, food for thought.