As a scientist, I cannot definitively answer this question as it is ultimately up to Brian Greene and his team to decide. However, there have been no official announcements or plans for a documentary adaptation of "The Hidden Reality" as of yet.
"The Hidden Reality" explores complex concepts in theoretical physics and cosmology in an accessible and engaging manner. A documentary adaptation could visually illustrate these ideas and potentially inspire a wider audience to learn more about these topics.
The target audience for a documentary adaptation of "The Hidden Reality" would likely be science enthusiasts, students, and anyone interested in the mysteries of the universe.
One of the main challenges would be translating complex scientific concepts into a format that is visually engaging and easy to understand for a general audience. There may also be budgetary and logistical challenges in filming and producing a documentary on such a large and abstract topic.
Again, this is ultimately up to Brian Greene and his team to decide. However, as the author of "The Hidden Reality" and a renowned physicist, it is likely that he would have some level of involvement or consultation in the making of a documentary adaptation.