I definitely don't think they'd leave something like that for off screen. First it would throw the audience when 211 comes around. And ZW are most definitely together in 211. And the way they are although the relationship is in the new stages, it doesn't seem like they just get together at the very beginning of that episode. And honestly after the past 2 sad endings if they leave us hanging in limbo again also after last seasons raincheck that never was would drive the fans bonkers and I'm not sure if some would come back in January.