For those who missed this news, here is a round up of all the relevant links and even a YouTube video of the proceedings. There was some talk about 3D, but Mann as ever wasn't really giving anything away. I can see something like Agincourt in 3D with fight scenes, but a Capa biopic?
http://www.bigpicturebigsound.com/Baz-Luhrmann-Oliver-Stone-and-Michael-Mann-Talk-Blu-ray.shtml
http://uk.askmen.com/celebs/interview_400/489_michael-mann-interview.html
http://www.highdefdigest.com/news/show/Blu-ray/Panasonic/CES_2011/Michael_Mann/Baz_Luhrmann/Oliver_Stone/Blu-ray_Directors_Panel__CES_2011/6124
http://www.bleedingcool.com/2011/01/10/michael-mann-and-baz-luhrmann-both-considering-3d-projects/