Yes, this patch is The One With The German Battleships. The test server will be up tomorrow, August 9th, at 18:30 CEST, running until the 15; the full patch should come out a few days after that, at most.
Also included in this patch are going to be the removal of fail divisions (no more divisions with more than one tier of difference), more post-battle stats including damage done to targets you’ve spotted and damage you blocked with your armour, along with colourblind mode and other, smaller changes.
But most importantly, German battleships! Scharnhorst is likely to be released very soon, too.