Heh, alright, I'll go a different route then.
Firstly! Hi! and welcome. It's a pleasure to see new faces like this.
I just did some research on Rose, and she does appear to have some fairly substantial powers. Which is a little frowned upon in this RP, but it wouldn't hurt to fill out a character sheet for (the GMS) to read. We work well with others, and we're not in the habit of saying no without communicating and investigating a little bit. So, yeah. We'd love to see the interpretation that you have for this game. Don't forget, PM the sheet, we're trying to keep CS's invisible to possible players unless they are approved for the game.
Well, I could certainly drop her precognitive abilities. I totally forgot she even had those. Other than that, she's basically got the same powers as her father. So... she's pretty much Deathstroke with breasts. Actually, I don't think she has his healing factor, which is probably his most OP power. Other than that, its just the usual super-soldier stuff. Enhanced strength, reflexes, etc.
From the list of suggested characters, I also wouldn't be opposed to playing Canary (actually one of my favorite DC characters, I'm a huge Birds of Prey fan xD) but I saw someone else express potential interest in the role, and as much as I love her, I'm not entirely confident in my ability to play her.
Ravager is awesome, though if you know Kate, hows about the female Question?
As for Montoya... while I'm familiar with her from Batman: The Animated Series, and her comic book relationship with Kate, I honestly am not too familiar with her role as Question.