Understandably, Floyd wasn’t the easiest criminal for the BAU agents to share mental space with, so having him appear again presumably won’t be the most rewarding situation.
Fans will probably recall the unique mental state that Floyd was in for the Season 3 episode “Lucky,” as he’d initially thought himself to be possessed by a flesh-eating demon.
As a child, he was committed to mental hospital after taking a bite out of his older sister, but released back into the world at age 18, at which point he opened up a BBQ restaurant and continued to sate his unique hunger for a while, until his murders are discovered by the BAU, that is.