That's clearly what they're indicating from their latest newsletter:
I'm very glad they'll be releasing it. I'd been expecting this since I saw it in a theater last year on a Janus Films re-release.
The hint also seems to indicate that they'll be releasing other Max Ophuls movies as well. I'd love for Madame De... to have its own regular Criterion release, so maybe that'll happen, plus an Eclipse set of other Ophuls? His four late '40s Hollywood films all played at museum screenings in Washington DC very recently, so that would make for a great "Ophuls in Hollywood" Eclipse set: The Exile, Letter From An Unknown Woman, Caught, and The Reckless Moment.
That last bit is really just speculation, since I don't know if Criterion has the rights to any of those. Madame De... is no surprise as a Criterion release because it was distributed in theaters by Janus.