If that's the case then I will be fine. This quote from the article made me nervous:
He added this won’t be a “throwaway ‘imaginary story’ either. It will have an emotional impact on both sets of characters, and there is one other aspect that will have a more lasting effect, but I can’t spoil that here.”
Yeah, that does sound some what ominous I suppose. But as long as the "change" (if that is what it will be to one of the characters) is one that makes sense and has lasting effects, then maybe that is okay as well. Perhaps it was a thing he wanted to do to a character anyway and having the League or a character IN the League, do something that makes that change occur, I think that would be pretty cool.
Of course I don't see this lasting change happen with the DC characters, he has no control over that and the big two are all about change that changes back

, but with his own characters? Hopefully it will stick and it will make it more fun or at least interesting for us down the line.
Maybe Dragonfly meets Manhunter and he sees something in her head that makes us all a little worried?

But hey, I agree with what you said about the job he's done so far, so let us hope
