There is a line from Cid right after the Darnus fight where he says that thankfully Louisoux will not need to use his last resort plan. I'm guessing this last resort is the image in the trailer. So in jRPG tradition, the seemingly 'end' is not as there will be a twist in 1.23a ... it seems this twist will bring about the radical changes, else, why would Goobbue go away?

My guess is right about August 15th to coincide with the end of the event and Gamescon.