We know damn well Lamb of God is in the studio, but with who? According to this Instagram post it's either Josh Wilbur, which seems to be the frontrunner in all the comments sections, or Gene "Machine" Freeman. Take a look for yourself!
https://instagram.com/p/2jYl6LgFYl/
For argument's sake, Wilbur re-mixed Lamb of God's As The Palaces Burn for its 2013 re-release, recorded drums and guitars for 2006's Sacrament, produced and mixed 2009's Wrath and produced 2012's Resolution. Machine remixed 2004's Pure American Metal, produced, recorded, mixed and engineered 2004's Ashes of the Wake, mixed and mastered 2005's Killadelphia live album and produced, mixed and recorded 2006's Sacrament.
So either one of these two are completely viable choices! In the meantime, has anyone figured out what the band's website is counting down to?