I realized something after thinking for a while about a teaser image posted recently. You know, the one featuring Batman outside the Justice League International embassy? I realized that Batman knows.
Now, obviously Batman knows lots of stuff. He's one of the smartest guys around. But I'm thinking of something very specific. During Blackest Night Batman was dead (or at least was assumed so). Most importantly, he wasn't on Earth during our time period (as far as we know). He wasn't around when Max Lord came back.
And he wasn't around when Max Lord mindwiped the planet.
That means when Batman does get back (hopefully sooner rather than later) he'll remember Max Lord. And it's a whole different ballgame when one of the people who knows the truth is someone other than the disgraced members of the JLI.
Max Lord didn't count on Batman. But Batman counts on everything.