US site Aintitcool.com says Reeves broke the news while speaking at the London School of Performing Arts to promote his new film, Henry's Crime. The site's correspondent writes: "He met the Wachowskis for lunch over Christmas and stated that they had completed work on a two-picture script treatment that would see him return to the world of the Matrix as Neo.
https://www.theguardian.com/film/2011/jan/24/matrix-4-keanu-reeves-wachowski
Well, as a fan of Wachowskis work .. I really would like to see M4 back to the origins as a cyber(and cypher)punk movie and more debate about AI ...