It actually has to do with Guy Ritchie being tagged by Warner Bros. for the film project EMPIRE RISING. However, there is an oblique reference to the upcoming THE MAN FROM U.N.C.L.E. movie that definitely suggests WB expects the director's current focus to be on MFU.
Ritchie’s current project is also a Warner Bros. feature and filming for The Man from U.N.C.L.E. has yet to commence. It looks like filming for Empire Rising will begin only after the spy series hits theatres next year. Warner Bros. obviously has a lot of faith in Ritchie’s ability and his talent at keeping the box office hits coming.
Note that sentence about the new (and I might highly touted) project only beginning filming "after the spy series hits theatres next year"...
Oh, and filming for the new MFU supposedly commences September 7th in London and Italy, according to the latest report.