My problem with your criticisms is your stance that people only like her because of the "childish" show. Fans of the show don't consider it childish. It had good stories and character development, especially considering most of the shows being shown around that time. And I actually read up on Raven's comic incarnation BECAUSE of the show, and I still think she's a very interesting character. That's like saying you wouldn't want Aquaman because of how pathetic he was in the Super Friends.
I tend to talk about Nightwing and Red Hood, because I consumed everything regarding these two. Nearly every single comic, animated apperance and so on.
Can I say the same for all the other people here, who somestimes do lack the comic book knowledge as I see it over and over again?
No, I can't and I also don't expect them to, because this is a fighting game forum and Injustice is a fighting game being made by NRS, a developer that has many followers here.
So how high is the chance that many of you want Raven in the game, just because you're attached to the Teen Titans show, without knowing that much about comics? The chance is pretty damn high.
And how high is the chance that you will drop Raven, when you realize that she isn't that good of a character in the game (if that happens), simply because you don't relate to her as much as I do to Nightwing and Red Hood? Tier jumping is common in fighting games, so ... the chance is there.
And then we're all left with that one character who is only there, because so many people wanted her from the beginning and were willing to buy the game just because of her (which is actually very stupid reason and probably doesn't apply for anyone).
We're left with Raven and the game lacks actually unknown characters who were promissed us at the beginning of the marketing for the game. And that is a pity.
We're left with Raven, yet another "I shoot a laser beam at you" character, even though we could have someone with a completely unique play style like Scarecrow, even though he is a Batman character and the game is supposed to be sooooo oversaturated with them at the moment.