All the pre release details for the last DLC mentioned a new mini campaign but the reviews and other information no longer mention this. Was it included?
There are few new missions related to Kaos Syndicate.
As mentioned on Steam and Reddit and now here, the mini-campaign refers to the 4 missions you can do to fully unlock the Kaos Market at cheapest prices. Whether calling those 4 missions a ‘mini-campaign’ is accurate or whatever, I suppose is a personal reaction. There is or was no other campaign intended.