Square Enix and Eidos announced today on the Deus Ex website that Deus Ex: Mankind Divided's second story DLC, "A Criminal Past", will be released on February 23. This DLC takes place sometime before the events of Mankind Divided: during Adam's first missions with TF29.
In Deus Ex: Mankind Divided – A Criminal Past, Adam investigates a hostile Arizona prison for augmented felons. His aim is to determine what happened to a fellow undercover agent that has gone dark. Despite success of the mission being somehow important to defeating terror around the world, the release says Jensen will need to "confront a darker side to his role" in order to see this one to completion.
No pricing has been announced yet, but System Rift, the first story DLC, was $12 for reference. If you shelled out $30 dollars for the season pass way back when, then you've already paid for it.
See our video review of Mankind Divided here.