The limited edition is all the content from Kauyon and Mont'Ka. It contains 6 metal mission markers, 2 posters, a box, a 216 page hardcover fluff book and seven booklets including a uniform guide showing the forces of the campaign (Tau and Imperial). English only and limited to 1250 copies.
Mont'Ka campaign book set
Cadia
Farsight Enclave
get detachments, formations, warlord traits and new 'equipment'. This is a generic term in german. It is likely this means Relics.
The full Assassin rules are included.
There are nine datasheets for the Imperial super-heavy tanks. New formations for Tau (e.g. The Eight).
120 page fluff book
88 page rule book including the aforementioned material and lots of missions to play the story arc of the Mont'Ka campaign.
Datacards
Each have 6 warlord trait and 36 tactical objective cards. They are also shown in the Mont'Ka book. It is not made clear if these are 6 new missions plus 30 old ones or 36 new missions.
Karlaen
His rules datasheet will be available soon from Warhammer Digital. No information if it will be for free.
I don't see a connection with Mont'Ka anywhere in these pics so the BA characters seem to be an unrelated release.
