Update — 1:14pm: A commenter below cross checked the Wikileaks url with archive.org, and found that most of the files were added to the site back in 2014. Some updates did take place.
Wikileaks normally issues official releases of archived data. No statements have been posted on the official website of Wikileaks as of yet.
In this instance, there appears to have been an unofficial opening of archives, according to twitter users.
Some is old but it looks like some is new.
BAKER NOTABLE
Massive Wikileaks dump. Nonsearchable. Will take a lot of eyes.