It will probably take some time since the valvebody has to be reworked. Although, the 4L80E has a t/b available where you keep auto shifting functions. I would suspect it would be years before this would happen though.
PA is working on it as we speak. Just like they did when the 5R's came out in 05 Mustang's. The 5R deal didn't work out because the 5R's valvebody isn't quite strong enough.
These new 6R80's are bad news, and are one helluva trans!!