According to a tweet from FUNimation this morning, Space Dandy season two will be blasting off again on July 5th at 12:30. This means Attack On Titan is likely to keep it’s timeslot for the rest of it’s run. We’ll update this article once more information is available. 
Update: Toonami just put up a post on their Tumblr repeating the same thing.
Update: A new trailer from Japan has hit the net: http://youtu.be/xVde2A6zqUg