So far this has been going on for 3 years by writer Jorge Luis Sucksdorf and directed by Cesar A. Turturoo. This has been filmed in Argentina, so it is in Spanish, but there are subtitles for us in English and Japanese. You can check them out on Facebook if you can like and follow their progress. They also have some nice shots of the movie and some of the places they have visited there.
I have added the YouTube videos that they have made so far. This way, in case you didn't catch the first one you can and then follow up with the second.
Source: Anime News Network