In a Hero Complex interview with Jim Lee, they listed the following reply, talking about Batman Europa;

That's a project I began a while back when I was living in Italy for a year. It's still on deck. I've gotten sidetracked with other projects. I'm working currently on [the nine-issue series] "Superman Unchained" with a writer named Scott Snyder.

The square brackets indicate that this was said elsewhere in the interview but not in the actual paragraph quoted. I suppose, the next question is… what comes next? After Europa that is… Could it be that WildCATS revival that Bleeding Cool recently rumoured? Or could it be Divine Right, recently trademarked by DC?

UPDATE: Scott Snyder helps dampen the flames…

@Bennyjamin28 Naw! This ARC is 9-10 issues. Series is ongoing, and Jim & have said to each other, and publicly, we're playing it by ear… — Scott Snyder (@Ssnyder1835) October 7, 2013

@Bennyjamin28 … in terms of whether we'll do the next arc, or let someone else. But we're enjoying working together a lot, so we'll see — Scott Snyder (@Ssnyder1835) October 7, 2013