I was thinking Mark Neil formerly of Toe Rag Studios was producing the new album. Maybe he just engineered the recording
Danger Mouse is apparently back in the seat for some of it at least. Maybe just mixing?
http://thebunkerstudio.blogspot.com/2009/12/black-keys-and-dangermouse-in-bunker.html
"Black Keys and Dangermouse in the Bunker!
We just finished a busy long weekend with The Black Keys and Dangermouse, working on the single for their new record... the track is gonna be banging! They are a bunch of really talented dudes, and are also a lot of fun to hang out with, so it was a really fun, really productive session. Can't wait to hear the final mixes!"
"The Bunker Studio Brooklyn, New York, United States
The Bunker is the home of sound and mayhem for John Davis and Aaron Nevezie"