All I know that things must be moving if the date was updated from 20 December 2014 to 28 June 2015.  Normally when nothing happens they update with “status unknown”.  Last we heard James Gray was hoping to start principal photography on 8 August.  Anyway I know we love seeing things moving ahead and in typical fashion Screen Daily mentioned LCoZ on 15 June 2015 and of course omitted Rob’s name:
“James Gray’s The Lost City Of Z starring Charlie Hunnam, which is scheduled to begin shooting in August.”
Here’s a screenshot from IMDbPro which still lists
 
Let’s hope he’s got things together & isn’t backing out or anything.