Personally I'm hoping this goes strong. it may just be because it's 'hot' right now, but if DC can follow through and deliver something good with some consistency, I think there's a fair chance they can keep those numbers. I mean let's face it: this is the move that SOMEONE needed to make. I'm surprised Marvel hasn't tried this before given the greater popularity of their movies. It only makes sense to capitalize on the the superhero boom before it fades completely. It's just a matter of having the follow-through to put out a good series in addition to good first issues, to keep advertising the hell out of it and garnering new customers, and a little bit of luck never hurts either.
As for the whole sexuality thing....well, it's not pretty, but I suppose from a certain point of view I get where they're coming from. As always, the bottom line is that sex sells. Yes, that can be considered cheap pandering, but when you're trying to appeal to the masses, sometimes cheap pandering is the only way to go. Not exactly honorable or filled with integrity, but I'd say if they can confine the, um....'teenage virgin' syndrome to one or two female characters and do good work with the rest, that would at least make the best of a bad situation.