With the official video up of Assassinorum: Execution Force about the web now, it leads me to ponder the role of these Clades in 30k.
So Nemesis the Horus Heresy Novel, featured 6 different Assassin Clades (2 of which were new creations to my knowledge). This box includes the common four people know and love Culexus, Eversor, Vindicare and Callidus. It is rumoured to have several different game types in the box.
The Assassinorum would not regularly fight along side the Legionnes Astartes so I hope that this gives us a Kill Team style combat system which enables us to use these minis in Necromunda style missions.
The missing two Clades from Nemesis are not really field operatives so I Can't imagine them ever getting Minis, but I would love Forge World to do a Rule set to represent them in the Heresy. Forge world have confirmed their interest in creating operatives in the past.
The Bunnies are planning this as a day 1 purchase. Hopefully we can get a report up after rules are read and minis painted so stay tuned.