That is something of a surprise, isn't it? I had to go look up the lawsuit in Wikipedia because it's been going on for so long that I really couldn't remember when it was first filed.
It started in 2005, and it's been going on for longer than the modern ebook market. I find that mind-boggling.
The current deadline follows a rejected settlement back in March. The $125 million settlement pretty much gave Google permission to pirate other people's content until they noticed and said no. Naturally, the judge rejected the settlement. Any new agreement will need to not affect parties not involved in the lawsuit, and that's causing a delay. Apparently Google won;t give up on all the content they scanned without permission.
image by Umbrovskis.com