JHW3's comments on his blog did suggest some differences though:As of this weekend Greg Rucka, who I’ve enjoyed working with very much, has announced his intentions to leave DC Comics, and in turn leave Batwoman behind. I was afraid something like this was going to occur but held out hope that it wouldn’t happen. That DC and Greg could come to some sort of agreement, apparently not going to happen. So what does this mean for Batwoman and the project I’ve spent a decent amount of time and thought on? I don’t know. I do know that DC is firmly committed to this character from what I hear from them. So where does all of this leave us? I believe DC will want the character to continue somehow. In what form? I’m not sure, but she’ll be back, I’m sure of it. This character has too much potential to just go by the wayside. So we should be hearing some sort of news at the appropriate time I assume.

Yeah, JH sounds somewhat disappointed and caught off-guard by this ... so maybe there is something else going on here ...

Reading Geoff Johns' careful words ... maybe it IS all about money and negotiating the right compensation package for Rucka ... particularly if the alternative that Rucka is posing is that he is returning to his Oni creator-owned work (i.e.  not exactly a huge overwhelming THREAT to DC).