Korn have promised to release a new album this fall. It seems they are taking their time and not recording by traditional means.
For example, vocals are typically the last thing recorded in the process of making a new album. Jonathan Davis just posted he's in the studio working on vocals. Here's JD's post:
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I want to thank you all for your kind words over the last couple months what I’m going thru has not been easy by any means. You all helped make the pain bearable. In return I promise to give you my all on this amazing new @korn_official record we all can heal together. #recordingvocals
However, in an interview published last month on Consequence Of Sound, guitarist Brian "Head" Welch made it clear most of the instruments aren't recorded, and they might not be done writing yet:
“At this time, guitars aren’t finished, and I don’t know if we’re done writing. We’ve written a lot, but I’m not sure if we’re done writing yet. Bass is not done. Most of the drums are done on the songs we have, and a little bit of vocals have been worked on.”
In a new interview with Revolver, guitarist Brian "Head" Welch says that Korn wrote some new songs with Goldfinger's John Feldmann and Blink-182's drummer Travis Barker, though the latter of which worked mainly on drums. Welch also says "we're writing with different people."
"We're doing it all over. We've been to Nashville a few times, we've done a lot in L.A. We actually wrote with John Feldmann, too, for the demos. Travis Barker laid the temporary drums for some, and that was cool. We've known John Feldmann since '87 — he was in Electric Love Hogs. So we're writing with different people. We grabbed [producer] Nick Raskulinecz, and he's very hands on and such a fan of music. It's not a job or a gig to him."
We'll see if Korn have things figured out for their proposed timeline of release this fall.