Please bear with me if this should be in High-end Audio section or not (please hold your opinions on the Ed10 for the moment ;-)). However Timelord in Japan (via Fujiya) just announced the Ultrasone Edition 12 for a tentative July 2013 release.
Information in Japanese released here :-
I'll get the translation later but just at face value it looks like an Edition 10 but there are differences to the specs namely :-
2) Ed10 40mm Titanium-plated vs Ed12 40mm Gold-plated
3) Ed10 32 ohm vs Ed12 35 ohm
[to start off with]
Currently it's unknown if it's Japan-only or international. I couldn't see any announcement on Google aside from this.