what the hell is nintendo's problem with all this region crap. its as if they want us to jump through hoops to actually get the full value out of our system. Irish estore, nothing, changed to UK estore and its there, but telling me the software is currently unavailable.
It's definitely Not in the US shop on my 3DS. Searching "green lantern" doesn't turn up any results, nor does simply checking in the "New Arrivals" section, and clicking on videos. Did you mess with your region settings like others described?